MPM3695GRF-25-0022 - Monolithic Power Systems

MPM3695-25

16V, 20A, Scalable

DC/DC Power Module with PMBus

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 1

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DESCRIPTION

The MPM3695-25 is a scalable, fully integrated

power module with a PMBus interface. The

MPM3695-25 offers a complete power solution

that achieves up to 25A of peak output current

with excellent load and line regulation over a

wide input voltage range. It operates with high

efficiency over a wide load range and can be

paralleled to deliver a higher load current.

The MPM3695-25 adopts MPS’s proprietary,

multi-phase constant-on-time (MCOT) control,

which provides ultra-fast transient response and

simple loop compensation. The PMBus

interface provides module configurations and

monitoring of key parameters.

The MPM3695-25 features full protection

features, including over-current protection

(OCP), over-voltage protection (OVP), under-

voltage protection (UVP), and over-temperature

protection (OTP). It requires a minimal number

of readily available external components and is

available in a QFN-59 (10mmx12mmx4mm)

package.

FEATURES

 Wide Input Voltage Range from 3V

- 3V-16V Input Voltage with External VCC

- 4V-16V Input Voltage with Internal VCC

 0.5V to 5.5V Output Voltage Range

 20A Continuous Output Current, Peak 25A

 Auto Interleaving for Multi-Phase Operation

 Auto Compensation with Adaptive MCOT

for Ultra-Fast Transient Response

 1% Reference Voltage Over 0°C to +70°C

Junction Temperature Range

 True Remote Sense of Output Voltage

 PMBus 1.3 Compliant

 Telemetry Read-Back Including VIN, VOUT,

IOUT, Temperature, and Faults

 Programmable via PMBus

o Current Limit

o Selection of Pulse-Skip Mode or

Continuous Conduction Mode (CCM)

o Soft-Start Time

o Switching Frequency

o Fault Limits

 Available in a QFN-59 (10mmx12mmx4mm)

Package

APPLICATIONS

 Telecom and Networking Systems

 Industrial Equipment

 Servers and Computing

 FPGAs/ASIC AI and Data Mining

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For

MPS green status, please visit the MPS website under Quality Assurance. “MPS”

and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 2

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TYPICAL APPLICATION

CTRL

VOSNS+

BST

VIN

OUT

PGND

VCC

VOSNS-

SCL

AGND

CIN

COUT

ALT

ISUM

RADDR

SDA

IREF

PASS

TAKE

ADDR

SET

VCC>

CFF

RTAKE

Single Phase Operation

Dual Phase Operation

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 3

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ORDERING INFORMATION

Part Number Package Top Marking

MPM3695GRF-25-xxxx* QFN-59

(10mmx12mmx4mm) See Below

EVKT-MPM3695-25-A \ \

* -xxxx is the configuration code identifier for the register settings stored in the MTP memory. Each “x” can be a

hexadecimal value between 0 and F. The part number with default register setting is MPM3695GRF-25-0022.

Please contact MPS to create a unique configuration identifier for customized design.

TOP MARKING

MPS: MPS prefix

YY: Year code

WW: Week code

MP3695: Part number

LLLLLLLLL: Lot number

25: Suffix of part number

M: Module

EVALUATION KIT EVKT-MPM3695-25-A

EVKT-MPM3695-25-A Kit Contents: (Items can be ordered separately).

# Part Number Item Quantity

1 EVM3695-25-RF-02A MPM3695-25 Single Phase Evaluation Board 1

2 MPM3695GRF-25-0022 1pcs MPM3695-25 Module 1

3 EVKT-USBI2C-02* Includes One USB to I2C Dongle, One USB Cable,

and One Ribbon Cable 1

Order Directly from MonolithicPower.com or MPS distributors

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 4

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PACKAGE REFERENCE

TOP VIEW

QFN-59 (10mmx12mmx4mm)

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 5

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PIN FUNCTIONS

PIN # Name Description

2,6 AGND Analo

round. Reference point of the control circuit.

3 IREF Current reference output. Keep this pin floating.

4 VOSNS-

Output voltage sense negative return. Connect directly to the GND sense point

of the load. Short to GND if remote sense is not used.

5 VOSNS+

Output volta

e sense positive return. Connect this pin to the positive sense point

of the output voltage to provide feedback voltage to the system.

7 VCC

Output of the internal 3.3V LDO. The driver and control circuits are powered by

this voltage. Must be connected to Pin 38.

8 BST Bootstrap. Keep this pin floating.

9-15, 58 SW Switch node. Keep them floating.

31-35 VOUT Module output voltage node. Connect with wide PCB copper plane.

18-28, 36,

37, 50, 51,

PGND Power ground. This pin is the reference point of the regulated output voltage.

Connect with PCB copper planes as wide as possible.

38 VCC> Input of driver circuit. Must be connected to Pin 7.

39 VDRV

Decoupling pin for 3.3V driver power supply.

40 SCL

PMBus serial clock.

41 SDA

PMBus serial data.

42 ALT

PMBus alert. Open drain output, active low. A pull-up resistor must be connected

to a 3.3V rail.

43 CTRL

Converter control. CTRL is a digital input that turns the regulator on or off. Drive

CTRL high to turn the regulator on, drive it low to turn it off. Do not float this pin.

44 PG

Multi-purpose power good output. This pin can be configured as an output pin for

single-phase operation or an input and output pin for multi-phase configuration. A

pull-up resistor connected to a DC voltage is required to indicate high if the output

voltage is higher than 90% of the nominal voltage. Refer to the application section

for detailed configuration.

47 PASS

Passes RUN signal to the next phase. Refer to the applications section for

connection details.

48 TAKE

Receives RUN signal from the previous phase. Refer to the typical applications

section for connection details.

49 SET

PWM signal. The set signal turns on the HSFET when a RUN signal appears. For

multi-phase operation, tie the SET pins of all the phases together.

52, 53 VIN

Supply voltage. This pin provides power to the module. Decoupling capacitors are

required to be connected between VIN and GND. Connect VIN with a wide copper

plane.

55 ADDR

PMBus slave address settin

pin. Connect a resistor between this pin to AGND

to set the address of this device.

56 ISUM

Reference current output. For single-phase operation, keep this pin floating; for

multi-phase operation, connect ISUM pins of all phases together.

1, 16, 17,

29, 30, 45,

46, 54, 57

NC No Internal Connection.

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 6

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ABSOLUTE MAXIMUM RATINGS (1)

Supply voltage (VIN) ...................................... 18V

VSW (DC) ................................... -0.3V to VIN + 0.3V

VSW (25ns) (2) ..................................... -3V to 25V

VSW (25ns) .......................................... -5V to 25V

VOUT ............................................................ 5.5V

VBST ........................................................ VSW + 4V

VCC ............................................................... 4.5V

CTRL current (ICTRL) ................................. 2.5mA

All other pins .................................. -0.3V to 4.3V

Continuous power dissipation (TA = +25°C) (3)

........................................................................ 5W

Junction temperature ................................ 170°C

Lead temperature ...................................... 260°C

Storage temperature ................. -65°C to +170°C

Recommended Operating Conditions (4)

Supply voltage (VIN) ............................ 4V to 16V

Output voltage (VOUT) ...................... 0.5V to 5.5V

External VCC bias .......................... 3.12V to 3.6V

CTRL current (ICTRL) ..................................... 1mA

Operating junction temp. (TJ). ... -40°C to +125°C

Thermal Resistance (5) θJA θJB

QFN-59 (10x12x4mm) ........... 17 ...... 3.4 ... °C/W

NOTES:

1) Exceeding these ratings may damage the device.

2) Measured by using differential oscilloscope probe.

3) The maximum allowable power dissipation is a function of the

maximum junction temperature TJ (MAX), the junction-to-

ambient thermal resistance JA, and the ambient temperature

TA. The maximum allowable continuous power dissipation at

any ambient temperature is calculated by PD (MAX) = (TJ

(MAX)-TA)/JA. Exceeding the maximum allowable powe

dissipation produces an excessive die temperature, causing

the regulator to go into thermal shutdown. Internal thermal

shutdown circuitry protects the device from permanent

damage.

4) The device is not guaranteed to function outside of its

operating conditions.

5) Measured on EVM3695-25-RF-02A Demo Board 6-LAYERS

PCB.

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 7

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ELECTRICAL CHARACTERISTICS

VIN = 12V, TJ = -40°C to 125°C, unless otherwise noted.

Parameters Symbol Condition Min Typ Max Units

VIN Supply Current

Supply current (shutdown) IIN V

CTRL = 0V 2.5 4 mA

Input Voltage

Input voltage range VIN No external VCC 4 16 V

With 3.3V External VCC 3 16

Output Voltage

Output voltage range(6) VOUT_RANGE 0.5 5.5 V

Load regulation(6) VOUT_DC_Load IOUT from 0A to 25A ±0.5 %VOUT

Line regulation(6) VOUT_DC_Line VIN from 4V to 16V,

IOUT = 20A ±0.5 %VOUT

Current Limit

Valley current limit ILIM Default setting 27 A

Min valley current limit

programmable value(6) 5 A

Max current limit

programmable value(6) 32 A

Low-side negative current

limit in OVP ILIM_NEG_OVP -13 A

CTRL

CTRL ON threshold CTRLON 2.04 2.2 V

CTRL OFF threshold CTRLOFF 1.66 V

Frequency and Timer

Switching frequency fSW Default Value 600 kHz

Minimum on time (6) T

ON_MIN Fs = 1000kHz, Vo = 0.6V 50 ns

Minimum off time (6) T

OFF_MIN V

FB = 580mV 220 ns

Output Over-Voltage and Under-Voltage Protection

OVP threshold VOVP Default setting (D4h[1:0] =

00) 111% 115% 119% VREF

UVP threshold VUVP Default setting (D9h[3:2] =

10) 75% 79% 83% VREF

Max programmable OVP

threshold VOVP_max D4h[1:0] = 11 126% 130% 134% VREF

Min programmable OVP

threshold VOVP_min D4h[1:0] = 00 111% 115% 119% VREF

Max programmable UVP

threshold VUVP_max D9h[3:2] = 11 80% 84% 88% VREF

Min programmable UVP

threshold VUVP_min D9h[3:2] = 00 65% 69% 73% VREF

MPM3695-25 – 16V, 20A, SCALABLE, DC/DC POWER MODULE WITH PMBUS

MPM3695-25 Rev. 1.01 www.MonolithicPower.com 8

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ELECTRICAL CHARACTERISTICS (continued)

VIN = 12V, TJ = -40°C to 125°C, unless otherwise noted.

Parameters Symbol Condition Min Typ Max Units

OSM threshold rising VOSM_RISE 104% VREF

OSM threshold falling VOSM_FALL 102% VREF

ADC(6)

Voltage range 0 1.28 V

ADC resolution 10 bits

DNL 1 LSB

Sample rate 3 kHz

DAC (Feedback Voltage)

Range 500 600 672 mV

Feedback accuracy VFB T

J = +25°C 594 600 606 mV

Feedback accuracy VFB T

J = -40°C to 125°C 591 600 609 mV

Resolution(6) Per LSB 2 mV

Feedback voltage with margin

high (6) VFB_MG_HIGH 672 mV

Feedback voltage with margin

low (6) VFB_MG_LOW 500 mV

Soft Start and Turn On/Off Delay

Soft-start time tSS 2 ms

Turn-on delay(6) t

ON_DELAY Default setting 0 ms

Turn-off delay tOFF_DELAY Default setting 0 ms

Error Amplifier

Feedback Current IFB V

FB = VREF 50 100 nA

Soft Shutdown

Soft shutdown discharge FET RON_DISCH 60 

Under-Voltage Lockout (UVLO)

VCC under-voltage lockout

threshold rising VCCVth Default setting 2.6 2.75 2.9 V

VCC under-voltage lockout

threshold hysteresis VCCHYS Default setting 200 mV

Min input programmable turn-

on voltage VIN_ON_MIN V

CC= 3.3V 3 V

Max input programmable

turn-on voltage VIN_ON_MAX 15 V

Min input programmable turn-

off voltage VIN_OFF_MIN V

CC= 3.3V 2.75 V

Max input programmable

turn-off voltage VIN_OFF_MAX 14.75 V