VICOR PRM48AH480 200A00 Series Bedienungsanleitung

Features

•48.0 V input (36.0 V to 75.0 V),

non-isolated ZVS buck-boost regulator

•20.0 V to 55.0 V adjustable output range

•200 W output power in 0.57 in2footprint

•96.7% typical efficiency, at full load

•1341 W/in3(82 W/cm3) Power Density

•5.29 MHrs MTBF (MIL-HDBK-217 Plus Parts Count)

•Pin selectable operating mode

Adaptive Loop

Remote Sense / Child Operation

•Half VI Chip®Package

22.0mm x 16.5mm x 6.73mm

Typical Applications

•High Density Power Supply DC-DC rail outputs

•High Density ATE system DC-DC power

•Telecom NPU and ASIC core power

•Communications Systems

•Non-isolated and isolated power converters

Product Description

The VI Chip® PRMTM Regulator is high efficiency converter,

operating from a 36.0 to 75.0 Vdc input to generate a regulated

20.0 to 55.0 Vdc output. The ZVS buck-boost topology enables

high switching frequency (~1.03 MHz) operation with high

conversion efficiency. High switching frequency reduces the

size of reactive components enabling power density up to

1341 W/in3.

The Half VI Chip® package is compatible with standard pick-

and-place and surface mount assembly processes with a planar

thermal interface area and superior thermal conductivity.

In a Factorized Power Architecture™ system, the PRM and

downstream VTMTM current multiplier minimize distribution

and conversion losses in a high power solution, providing an

isolated, regulated output voltage.

The PRM48AH480x200A00 has two selectable modes of

regulation depending on the application requirements.

In Adaptive Loop Operation, the PRM48AH480x200A00 utilizes

a unique feed-forward scheme that enables precise regulation

of an isolated POL voltage without the need for remote sensing

and voltage feedback.

In Remote Sense Operation, the internal regulation circuitry is

disabled, and an external control loop and current sensor

maintain regulation. This a ords ﬂexibility in the design of both

voltage and current compensation loops to optimize

performance in the end application.

High Efficiency Converter

NRTL

C US

PRMTM Regulator

PRM48AH480x200A00

Product Ratings

VIN = 36.0 V to 75.0 V POUT = 200 W

VOUT = 48.0 V IOUT = 4.17 A

(20.0 V to 55.0 V Trim)

Rev 1.6

PRM™ Regulator

Page 1 of 42 09/2020

PRM48AH480x200A00

PRM

ENABLE

TRIM

SHARE/

CONTROL NODE

IFB

VAUX

REF/

REF_EN

+IN

–IN

+OUT

–OUT

VOUT

+IN

–IN –OUT

+OUT

Adaptive Loop Temperature Feedback

VTM Start Up Pulse

SGND

GND

SGND

TRIM

ON/OFF

CONTROL

SGND

VF: 20 V to 55 V

ISOLATION BOUNDRY

SEC_GND

VTM

PRIMARY SECONDARY

CIN CF

COUT

Vin

External Current Sense

GND

SGND

ON/OFF

CONTROL

SGND

GND

Voltage Reference with Soft Start

Voltage Sense and Error Amplifier

(Differential)

VTM Start up Pulse

SGND

IN OUT

GND

REF

V +

VOUT

–IN+IN

V –

PRM

ENABLE

TRIM

SHARE/

CONTROL NODE

IFB

VAUX

REF/

REF_EN

+IN

–IN

+OUT

–OUT

SGND

+IN

–IN –OUT

+OUT

ISOLATION BOUNDRY

VTM

PRIMARY SECONDARY

CIN CF

COUT

REF 3312

[1] [1]

VIN

SGND

Voltage Sense

SGND

LOAD

Typical Applications

[1] Non-Isolated Conﬁguration: –Out connected to -IN

Typical Application: PRM48AH480x200A00 + VTM, non-isolated Remote Sense Configuration

Typical Application: PRM48AH480x200A00 + VTM Adaptive Loop Configuration

Rev 1.6

PRM™ Regulator

Page 2 of 42 09/2020

PRM48AH480x200A00

Half VIC

1234

SHARE/

CONTROL NODE ENABLE

TRIM

VAUX

IFB

SGND

REF/REF_EN

+IN

-IN

+OUT

-OUT

TOP VIEW

Number Signal Name Type Function

SHAR

(Adaptive Loop / Child Operation) BIDIR Parallel sharing control bus for parent-child conﬁguration.

CONTROL NOD Modulator control node input. Driven by external error ampliﬁer in Remote Sense

(Remote Sense Operation) INPUT Operation.

A3 VT INPUT VTM TM input for temperature compensation. Leave disconnected for Remote Sense

(Adaptive Loop Operation) Operation.

B2 NABL BIDIR nables power supply when allowed to ﬂoat high. 5 V during normal operation.

B4 VAUX OUTPUT 9 V auxiliary bias voltage.

C1 TRIM INPUT Selects operating mode. Adjusts output voltage in Adaptive Loop Operation.

C3 IFB INPUT Current sense input for current limit and overcurrent protection in Remote Sense Operation.

(Remote Sense Operation) Leave disconnected for Adaptive Loop Operation.

D2 NC n/a Do not connect this pin.

D4 SGND INPUT Signal ground, reference for analog controls. Kelvin connected internally to –IN and –OUT.

1 NC n/a Do not connect this pin.

R F

3 (Adaptive Loop Operation) OUTPUT Reference voltage for internal error ampliﬁer in Adaptive Loop Operation.

R F_ N

(Remote Sense Operation) OUTPUT Powers and enables external control circuit voltage reference in Remote Sense Operation.

F2 AL INPUT Adaptive loop gain control. Sets the magnitude of the Adaptive Loop load line in Adaptive

(Adaptive Loop Operation) Loop Operation. Leave disconnected for Remote Sense Operation.

F4 VC OUTPUT Bias voltage to power VTM module during start up

G1,G2 +IN INPUT Positive input power terminal

POW R

G3,G4 +OUT OUTPUT Positive output power terminal

POW R

H1,H2 -IN INPUT Negative input power terminal. Connected internally to -OUT.

POW R R TURN

H3,H4 -OUT OUTPUT Negative output power terminal. Connected internally to -IN.

POW R R TURN

Pin Conﬁguration

Pin Descriptions

Rev 1.6

PRM™ Regulator

Page 3 of 42 09/2020

PRM48AH480x200A00

Device Input Voltage

Range Package Type Output Voltage x 10 Temperature Grade Output Power Revision Version

PRM 48A H 480 T 200 A 00

PRM = PRM 48A = 36.0 V - 75.0 V H = Half VIC 480 = 48.0 V T = -40 to 125°C 200 = 200 WA 00 = AL / RS

SMD M = -55 to 125°C

Part Ordering Information

Part Number VIN Package Type VOUT Temperature Power Version

PRM48AH480T200A00 36.0 V - 75.0 V Half VIC 48.0 V -40 to 125°C 200 W AL / RS

PRM48AH480M200A00 SMD (20.0 V to 55.0 V) -55 to 125°C (Pin Selectable)

Standard Models

Parameter Comments Min Max Unit

SHAR / CONTROL NOD -0.3 10.5 V

+/-10 mA

NABL -0.3 5.5 V

+/-10 mA

+IN to –IN Continuous, non-operating -1 90 V

100 ms, non-Operating 100 V

VAUX -0.5 10.5 V

+/-100 mA

SGND +/-100 mA

IFB -0.5 5.7 V

-0.3 3.6 V

R F / R F _ N Remote Sense Operation (R F _ N) 10 mA

Adaptive Loop Operation (R F) 3.4 mA

TRIM -0.3 3.6 V

AL -0.3 3.6 V

VT -0.3 4.8 V

VC to –OUT -0.5 18 V

+/-1.8 A

+OUT to –OUT -1 62 V

Output Current 6.3 A

Internal Operating T Grade -40 125 °C

Temperature M Grade -55 125 °C

Storage T Grade -40 125 °C

Temperature M Grade -65 125 °C

Absolute Maximum Ratings

The ABSOLUT MAXIMUM ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to device.

lectrical specifications do not apply when operating beyond rated operating conditions. Operating beyond rated operating conditions for extended period of

time may affect device reliability. All voltages are specified relative to SGND unless otherwise noted. Positive pin current represents current flowing

out of the pin.

Rev 1.6

PRM™ Regulator

Page 4 of 42 09/2020

PRM48AH480x200A00

Electrical Speciﬁcations

Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the

temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.

Attribute Symbol Conditions / Notes Min Typ Max Unit

Power Input Speciﬁcation

Input Voltage Range VIN Continuous, operating 36.0 48.0 75.0 V

VIN Slew Rate dVIN /dt 0 ≤VIN ≤75.0 V 0.001 1000 V/ms

Initialization Voltage VINIT Internal micro controller initialization voltage 10 V

Initialization Delay tINIT From VIN ﬁrst crossing VINIT 5.0 7.0 9.0 ms

No Load Power Dissipation PNL NABL HIGH, VIN = 48.0 V 2.4 3.5 W

Input Quiescent Current IQC NABL LOW, VIN = 48.0 V 14.5 20.0 mA

Input Current IIN_DC IOUT = 4.17 A, VIN = 48.0 V, VOUT = 48.0 V 4.3 4.4 A

Input Capacitance (Internal) CIN_INT ffective value, VIN = 48.0 V (see Fig. 13)2µF

Input Capacitance (Internal) SR RCIN ffective value, VIN = 48.0 V 3.0 mΩ

Power Output Speciﬁcation

Rated Output Current IOUT Standalone and Parent Operation, see Figure 1, SOA 4.17 A

Rated Output Power POUT Standalone and Parent Operation, see Figure 1, SOA 200 W

VIN = 48.0 V VOUT = 48.0 V,

Switching Frequency FSW

IOUT = 2.08 A, TINT = 25°C 0.94 1.03 1.07 MHz

Over line, load, trim and temperature, 0.70 1.07 MHz

exclusive of burst mode

From VIN ﬁrst crossing VIN_UVLO+_SUPV 20 µs

Output Turn-ON Delay tON to NABL high; tINIT expired

From NABL pin release to NABL high, VIN applied, tOFF expired 20 µs

Start up Sequence Timeout tSTARTUP_S Q From NABL high to start up sequence complete 17 ms

VIN = 48.0 V, VOUT = 48.0 V, IOUT = 4.17 A, TINT = 25°C 95.25 %

VIN = 48.0 V, VOUT = 48.0 V, IOUT = 2.08 A, TINT = 25°C 94.095.0 %

fﬁciency Ambient ηAMB VIN = 36.0 V to 75.0 V, 93.25 %

VOUT = 48.0 V, IOUT = 4.17 A, TINT = 25°C

VIN = 36.0 V to 75.0 V,

IOUT = 4.17 A, TINT = 25°C, over trim 90.0 %

VIN = 48.0 V, VOUT = 48.0 V,

IOUT = 4.17 A, TINT = 100°C 94.8 96.8 %

VIN = 48.0 V, VOUT = 48.0 V,

IOUT = 2.08 A, TINT = 100°C 94.0 96.0 %

fﬁciency Hot ηHOT VIN = 36.0 V to 75.0 V , VOUT = 48.0 V,

IOUT = 4.17 A, TINT = 100°C 93.5 %

VIN = 36.0 V to 75.0 V , IOUT = 4.17 A,

TINT = 100°C, over trim 90.0 %

fﬁciency Over Temperature η>50% load and VOUT = 48.0 V; over temperature 94.0 %

>50% load; over temperature and trim 87.0 %

Output Discharge current IOD Average Value 0.5 mA

Output Voltage Ripple VOUT_PP

VIN = 48.0 V, VOUT = 48.0 V,

IOUT = 4.17 A, COUT_ XT = 0 F, 20 MHz BW 1000 1500 mV

Output Inductance (Parasitic) LOUT_PAR Frequency @ 1.03 MHz, Simulated J-Lead model 2.5 nH

Output Capacitance (Internal) COUT_INT ffective value, VOUT = 48.0 V (see Fig.13)2µF

Output Capacitance (Internal) SR RCOUT ffective value, VOUT = 48.0 V 3.0 mΩ

Rev 1.6

PRM™ Regulator

Page 5 of 42 09/2020

PRM48AH480x200A00

Electrical Speciﬁcations (cont.)

Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the

temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.

Attribute Symbol Conditions / Notes Min Typ Max Unit

Power Output Speciﬁcations: Adaptive Loop Operation

Output Voltage Setpoint VOUT_S T No load, trim Inactive, Adaptive Loop load line inactive 47.00 48.00 49.00 V

Output Voltage Trim Range VOUT 20.0 55.0 V

Output Voltage Rise Time tRIS _VOUT From soft start initiated to output voltage settled 1.7 1.8 1.9 ms

Output Voltage Load Regulation VOUT_R G_LOAD Adaptive loop load line inactive 0.02 0.2 %

Output Voltage Line Regulation VOUT_R G_LIN Adaptive loop load line inactive 0.02 0.2 %

Total Regulation rror VOUT_R G_TOTAL PRM output voltage, Adaptive Loop load line inactive 0.2 %

VTM output voltage, total Adaptive Loop regulation, 13%

Total AL Regulation rror VOUT_R G_AL

VOUT = 48.0 V, trim inactive

VTM output voltage, total Adaptive Loop regulation, 5%

trim active, exclusive of external resistor tolerances

VIN = 48.0 V, VOUT = 48.0 V, TINT = 25°C, constant 4.6 5.2 5.8 A

Output Current Limit ILIMIT current limit after supervisory limit detection time tLIM_SUPV

Over line, load, trim and temperature 4.2 6.3 A

Load Capacitance ( lectrolytic) CLOAD_AL L

0.1 Ω≤SR ≤1Ω, See Figure 32,

total capacitance (CLOAD_AL L + CLOAD_C R) ≤47 µF 47 µF

Load Capacitance (Ceramic) CLOAD_C R 2mΩ≤SR ≤200 mΩ, See Figure 32 25 µF

Load Transient Voltage Deviation VTRANS

10% ↔100% load step, 10 A/µsec, 0 µF COUT

,4.8 V

deviation from initial setpoint

10% ↔100% load step, 10 A/µsec, 0 µF COUT

Recovery to 90% of final value, Adaptive Loop 100 µs

Load Transient Recovery Time tTRANS

load line inactive

10% ↔100% load step, 10 A/µsec, 0 µF COUT

Recovery to 90% of final value, 500 µs

Adaptive Loop load line active, VAL = 1.20 V

Power Output Speciﬁcations: Child Operation with AL Parent

3.3 A

Rated Current Within an Array IOUT_ARRAY

Child Operation within an array, up to 5°C case

temperature differential, parent-child conﬁguration

2.9 A

Child Operation within an array, up to 30°C case

temperature differential, parent-child conﬁguration

160 W

Rated Power Within an Array POUT_ARRAY

Child Operation within an array, up to 5°C case

temperature differential, parent-child conﬁguration

140 W

Child Operation within an array, up to 30°C case

temperature differential, parent-child conﬁguration

qual input, and output voltage at full load; 15 %

VIN = 48.0 V, VOUT = 48.0 V

qual input and output voltage at full load;

IOUT_SHAR _MS

Over line and trim, with 25°C ≤TC≤100°C and ≤5°C 15 %Current Sharing Difference

(Parent to Child) part-part temp. mismatch

qual input, and output voltage at full load;

Over line and trim, with 25°C ≤TC≤100°C 20 %

and ≤30°C part-part temp. mismatch

Rev 1.6

PRM™ Regulator

Page 6 of 42 09/2020

PRM48AH480x200A00

Electrical Speciﬁcations (cont.)

Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the

temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.

Attribute Symbol Conditions / Notes Min Typ Max Unit

Power Output Speciﬁcations: Child Operations (cont.)

qual input, output, and SHAR voltage at full load;

VIN = 48.0 V, VOUT = 48.0 V 5%

qual input, output and SHAR voltage at full load;

IOUT_SHAR _SS

Over line and trim, with 25°C ≤TC≤100°C 10 %

Current Sharing

Difference (Child to Child)and ≤5°C part-part temp. mismatch

qual input, output, and SHAR voltage at full load;

Over line and trim, with 25°C ≤TC≤100°C 15 %

and ≤30°C part-part temp. mismatch

Maximum Array Size NPRMS_PARALL L 5PRMs

Maximum number of parallel devices,

parent-child conﬁguration

Power Output Speciﬁcations: Remote Sense Operation

Output Voltage Range VOUT 20.0 55.0 V

Remote Sense Operation within an array, 3.8 A

Rated Current Within an Array IOUT_ARRAY

up to 5°C case temperature differential

Remote Sense Operation within an array, 3.3 A

up to 30°C case temperature differential

Remote Sense Operation within an array, 180 W

Rated Power Within an Array POUT_ARRAY

up to 5°C case temperature differential

Remote Sense Operation within an array, 160 W

up to 30°C case temperature differential

qual input, output, and CONTROL NOD voltage 5%

at full load; VIN = 48.0 V, VOUT = 48.0 V

qual input, output and CONTROL NOD voltage at

full load; Over line and trim, with 25°C ≤TC≤100°C 10 %

Current Sharing Difference IOUT_SHAR _RS and ≤5°C part-part temp. mismatch

qual input, output, and CONTROL NOD voltage at

full load; Over line and trim, 15 %

with 25°C ≤TC ≤100°C and ≤30°C

part-part temp. mismatch (worst case)

Maximum Array Size NPRMS_PARALL L

Maximum number of parallel devices, Remote Sense 10 PRMs

conﬁguration, CONTROL NOD externally driven

Rev 1.6

PRM™ Regulator

Page 7 of 42 09/2020

PRM48AH480x200A00

Electrical Speciﬁcations (cont.)

Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the

temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.

Attribute Symbol Conditions / Notes Min Typ Max Unit

Powertrain Protections

Input Undervoltage Turn-ON VIN_UVLO+ 30.9 33.0 V

Input Undervoltage Turn-OFF VIN_UVLO- Instantaneous powertrain shutdown, detected after tBLANK 26.0 28.8 V

Input Undervoltage Hysteresis VUVLO_HYST (VIN_UVLO+) - (VIN_UVLO-)1.9 2.2 2.4 V

Input Overvoltage Turn-ON VIN_OVLO- 79.6 82.9 V

Input Overvoltage Turn-OFF VIN_OVLO+ Instantaneous powertrain shutdown, detected after tBLANK 84.6 88.8 V

Input Overvoltage Hysteresis VOVLO_HYST (VIN_OVLO+) - (VIN_OVLO-)1.4 1.7 2.1 V

Output Overvoltage Threshold VOUT_OVP+ Instantaneous shutdown, detected after tPROT 56.0 58.3 60.1 V

Minimum Current Limited Vout VOUT_UVP 12 V

Overtemperature Shutdown Setpoint TINT_OTP Instantaneous shutdown, detected after tPROT 125 ºC

Output Power Limit PPROT 200 W

Short Circuit VOUT Threshold VSC_VOUT 8.8 V

Short Circuit VOUT Recovery Threshold VSC_VOUTR 9.5 V

Short Circuit CONTROL NOD Threshold VSC_VCN 7.2 V

Short Circuit CONTROL NOD VSC_VCNR 6.9 V

Recovery Threshold

Short Circuit Timeout tSC

Short circuit fault detected after VSC_VOUT

and VSC_VCN thresholds persist for this time 5 ms

Short Circuit Recovery Time tSCR xcludes tOFF 75 ms

Overcurrent (IFB) and tBLANK 50 120 150 µs

Input Over/Undervoltage Blanking Time

Overtemperature, Output Overvoltage

and NABL Shutdown Response Time tPROT 2 µs

(Hardware)

Powertrain Supervisory Limits

Input Undervoltage Turn-ON VIN_UVLO+_SUPV 33.8 35.2 V

(Supervisory)

Input Undervoltage Turn-OFF VIN_UVLO-_SUPV Powertrain shutdown, detected after tLIM_SUPV 30.5 31.8 V

(Supervisory)

Input Undervoltage Hysteresis VUVLO_HYST_SUPV (VIN_UVLO+_SUPV) - (VIN_UVLO-_SUPV)1.6 2.0 2.1 V

(Supervisory)

Input Overvoltage Turn-ON VIN_OVLO-_SUPV 75.6 78.8 V

(Supervisory)

Input Overvoltage Turn-OFF VIN_OVLO+_SUPV Powertrain shutdown, detected after tLIM_SUPV 80.3 82.7 V

(Supervisory)

Input Overvoltage Hysteresis VOVLO_HYST_SUPV (VIN_UVLO+_SUPV) - (VIN_UVLO-_SUPV)1.2 1.5 1.8 V

(Supervisory)

Undertemperature Shutdown Setpoint TINT_UTP

T Grade -40 ºC

(Supervisory) M Grade -55 ºC

Supervisory Limit Response Time tLIM_SUPV 150 µs

Rev 1.6

PRM™ Regulator

Page 8 of 42 09/2020

PRM48AH480x200A00

ENABLE

• The NABL pin enables and disables the PRM

• In PRM array conﬁgurations, NABL pins should be connected in order to synchronize start up

• NABL is 5 V with 1.8 mA source capability during normal operation

Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit

Normal NABL Voltage V NABL 4.7 5.0 5.3 V

Analog Output Operation NABL Current I NABL _OP 1.8 mA

Start up NABL Source Current I NABL _ N After tOFF 90 µA

Minimum Time to Start tOFF 13.0 15.0 17.0 ms

Start up NABL VNABL _ N 2.5 3.2 V

nable Threshold

NABL VNABL _DIS 0.97 2.40 V

Digital Input / Output

Standby Disable Threshold

NABL RNABL _ XT

Resistance to SGND required 235 Ω

Resistance ( xternal) to disable the PRM

Digital Output Fault NABL INABL _FAULT NABL voltage 1 V or above 4mA

Sink Current to SGND

Signal Speciﬁcations

Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.

Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).

VAUX: Auxillary Voltage Source

• Intended to power auxiliary circuits

• 9 V during normal operation with 5 mA source capability

Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit

VAUX Voltage VVAUX 8.6 9.0 9.5 V

Normal VAUX Current IVAUX 5mA

Operation IOUT = 0A, CVAUX_ XT = 0. Maximum

VAUX Voltage Ripple VVAUX_PP speciﬁcation includes powertrain 100 400 mV

Analog Output operation in burst mode.

VAUX Capacitance CVAUX_ XT 0.04 µF

Transition ( xternal)

VAUX Fault Response tFR_VAUX

From fault recognition to 30 µs

Time VAUX = 1.5 V

VC: VTM Control

• Pulsed voltage source used to power and synchronize downstream VTM during start up

• 14 V, 10 ms typical voltage pulse

Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit

VC Voltage VVC_START

Connected to VTM VC or equivalent, 13 14 18 V

IVC = 115 mA, CVC = 3.2 uF

Analog Output Start up VC Available Current IVC_START VC= 14 V, VIN > 20 V 200 mA

VC Duration tVC 710 16 ms

VC Slew Rate dVC/dt Connected to VTM or equivalent,

IVC = 115 mA, CVC = 3.2 uF 0.02 0.25 V/µs

NABL to VC Delay t NABL -VC 20 µs

Rev 1.6

PRM™ Regulator

Page 9 of 42 09/2020

PRM48AH480x200A00

SGND: Signal Ground

• All control signals must be referenced to this pin, with the exception of VC

• SGND is internally connected to -IN and -OUT

Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit

Analog Input / Output Any Maximum Allowable ISGND -100 100 mA

Current

Signal Speciﬁcations (cont.)

Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.

Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).

TRIM

• TRIM is used to select operating mode and trim the output voltage in Adaptive Loop Operation

• Internal pullup to VCC_INT through 10 kΩ resistor

•When pulled below 0.45 V during power up, Remote Sense / Child Operation is selected

• When allowed to pull up above 0.55 V during power up, Adaptive Loop Operation is selected

• Operating mode is detected during power up and cannot be changed unless input power is cycled

Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit

Internally Generated VCC_INT 3.20 3.28 3.36 V

Normal VCC

Operation Internal Pullup RTRIM_INT 0.5% tolerance resistor 9.83 10.00 10.18 kΩ

Resistance to VCC_INT

Analog Input Mode Detection tMOD _D T CT

From NABL high to mode detected, 100 140 200 µs

Delay after VIN ﬁrst applied

Mode Remote Sense

Detect nable Threshold VRS_MOD _ N 0.45 V

Pull below this value during ﬁrst

start up after application of power

to enable Remote Sense / Child

Operation

Remote Sense Pull above this value during ﬁrst

Disable Threshold VRS_MOD _DIS start up after application of power to 0.55 V

enable Adaptive Loop Operation

Rev 1.6

PRM™ Regulator

Page 10 of 42 09/2020

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