MP28162 – SINGLE-INDUCTOR, BUCK-BOOST CONVERTER WITH 1.5A MOSFETS

MP28162 Rev. 1.0

MonolithicPower.com

3

3/16/2023

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PIN FUNCTIONS

Pin #

Name

Description

A1

EN

On/off control. Pull the EN pin high to enable the MP28162; pull EN low or float the pin to

disable all internal circuits. EN is pulled down to AGND with an internal

, 1.5MΩ resistor.

A2, A3

VIN

Supply voltage for power stage.

B1

MODE/

SYNC

Operation mode selection. If the MODE/SYNC pin is low, the MP28162 switches between

pulse-skip mode and fixed-frequency pulse-width modulation (PWM) mode automatically,

based on the load level. If MODE/SYNC is high, the MP28162 works in fixed-frquency PWM

mode continuously. An external clock can be applied to MODE/SYNC for switching

frequency (fREQ) synchronization. MODE/SYNC is pulled down to AGND with an internal,

1MΩ resistor. Pull MODE/SYNC high or low via a resistor below 10kΩ.

B2, B3

SW1

Switch 1. Internal switches are connected to the SW1 pin. Connect an inductor between the

SW1 and SW2 pins.

C1

VCC

Supply voltage for control stage. The VCC pin is powered by the higher value between

the input voltage (VIN) and output voltage (VOUT). Decouple VCC using a 4.7

μF capacitor.

C2, C3

PGND

Power ground.

D1

AGND

Signal ground.

D2, D3

SW2

Switch 2. Internal switches are connected to the SW2 pin. Connect an inductor between the

SW1 and SW2 pins.

E1

FB

Output voltage feedback. Keep the FB pin and its associated traces far from noise

sources such as SW1 and SW2.

E2, E3

VOUT

Buck-boost converter output. Place an output capacitor (COUT) close to the VOUT and

PGND pins.

ABSOLUTE MAXIMUM RATINGS (1)

VIN to GND .....................................-0.3V to +6V

SW1, SW2 to GND .......... -0.3V (-1.5V for <5ns)

………………………...to +6.5V (+7.5V for <5ns)

All other pins ...................................-0.3V to +6V

Junction temperature ................................150°C

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

Continuous power dissipation (TA = 25°C) (2)

WLCSP-15 (1.3mmx2.1mm)................ 2.23W (5)

Storage temperature ................ -65°C to +150°C

ESD Ratings

Human body model (HBM) .................... ±2000V

Charged device model (CDM) .............. ±1000V

Recommended Operating Conditions (3)

Start-up supply voltage (VST) ..........1.8V to 5.5V

Operating voltage (VIN) ............... 1.2V to 5.5V (4)

Output voltage (VOUT)......................1.5V to 5.5V

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

Thermal Resistance

θJA

θJC

WLCSP-15(1.3mmx2.1mm)

EVL28162-C-00A (5)

.......... 56 ....... 1.... °C/W

JESD51-7 (6)

.......... 94 ...... 1.7 .. °C/W

Notes:

1) Exceeding these ratings may damage the device.

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

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

ambient

thermal

resistance,

θ

JA,

and

the

ambient

temperature, TA. The maximum allowable continuous power

dissipation at any ambient temperature is calculated by PD

(MAX) = (TJ (MAX) - TA) / θJA. Exceeding the maximum

allowable power dissipation can produce an excessive die

temperature, which may cause the regulator to go into

thermal

shutdown.

Internal

thermal

shutdown

circuitry

protects the device from permanent damage.

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

operating conditions.

4) If VCC is powered from a source exceeding 1.8V (such as

VOUT), the MP28162 can operate with VIN as low as 1.2V, but

the load capability is lower when VIN = 1.2V due to the high

RDS(ON) of SWA and low current limit.

5) Measured on the EVL28162-C-00A, a 2-layer, 1oz PCB

(51mmx51mm).

6) The

θ

JA value given in this table is only valid for comparison

with other packages and cannot be used for design purposes.

These values were calculated in accordance with JESD51-7,

and simulated on a specified JEDEC board. They do not

represent the performance obtained in an actual application.