1 A/0.6 A DC to DC Switching Regulator with

Independent Positive and Negative Outputs

Data Sheet

ADP5072

Rev. 0

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FEATURES

Input supply voltage range: 2.85 V to 5.5 V

Generates well regulated, independently resistor

Adjustable positive output to 35 V

Integrated 1.0 A main switch

Adjustable negative output to −30 V

Integrated 0.6 A main switch

1.2 MHz/2.4 MHz switching frequency with optional external

frequency synchronization from 1.0 MHz to 2.6 MHz

Resistor programmable soft start timer

Slew rate control for lower system noise

Individual precision enable and flexible start-up sequence

Out of phase operation

UVLO, OCP, OVP, and TSD protection

1.61 mm × 2.18 mm, 20-ball WLCSP

−40°C to +125°C junction temperature range

APPLICATIONS

Bipolar amplifiers, analog-to-digital converters (ADCs),

digital-to-analog converters (DACs), and multiplexers

Charge coupled device (CCD) bias supplies

Optical module supplies

RF power amplifier bias

Time of flight module supplies

TYPICAL APPLICATION CIRCUIT

ADP5072

SS

SW1

SW1

COMP1

COMP2

EN1

SYNC

SLEW

SEQ

EN2

AGND

PVIN

PVIN

AVIN

FB1

D1

L1

L2

SW2

PGND

PGND

FB2

VREF

D2

Figure 1.

GENERAL DESCRIPTION

The ADP5072 is a dual, high performance dc-to-dc regulator that

generates independently regulated positive and negative rails.

The input voltage range of 2.85 V to 5.5 V supports a wide

variety of applications. The integrated main switch in both

regulators enables generation of an adjustable positive output

voltage up to 35 V and a negative output voltage down to −30 V.

The ADP5072 operates at a pin selected 1.2 MHz or 2.4 MHz

switching frequency. The ADP5072 can synchronize with an

external oscillator from 1.0 MHz to 2.6 MHz to ease noise filtering

in sensitive applications. Both regulators implement programma-

ble slew rate control circuitry for the MOSFET driver stage to

reduce electromagnetic interference (EMI). Flexible start-up

sequencing is provided with the options of manual enable,

simultaneous mode, positive supply first, and negative supply first.

The ADP5072 includes a fixed internal or resistor programmable

soft start timer to prevent inrush current at power-up.

Other key safety features in the ADP5072 include overcurrent

protection (OCP), overvoltage protection (OVP), thermal

shutdown (TSD), and input undervoltage lockout (UVLO).

The ADP5072 is available in a 20-ball WLCSP and is rated for a

−40°C to +125°C junction temperature range.

Table 1. Family Models

Model

Boost

Switch (A)

Inverter

Switch (A)

Package

ADP5070 1.0

0.6

20-lead LFCSP (4 mm× 4 mm) and

20-lead TSSOP

ADP5071 2.0

1.2

20-lead LFCSP (4 mm × 4 mm) and

20-lead TSSOP

ADP5072 1.0

0.6

20-ball WLCSP (1.61 mm × 2.18 mm)

ADP5073 N/A

1.2

16-lead LFCSP (3 mm × 3 mm)

ADP5074 N/A

2.4

16-lead LFCSP (3 mm × 3 mm)

ADP5075 N/A

0.8

12-ball WLCSP (1.61 mm × 2.18 mm)