2 A/1.2 A DC-to-DC Switching Regulator with

Independent Positive and Negative Outputs

Data Sheet

ADP5076

Rev. A

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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 2.0 A main switch

Adjustable negative output to −30 V

Integrated 1.20 A main switch

1.2 MHz or 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, ADCs, DACs, and multiplexers

Charge coupled device (CCD) bias supply

Optical module supply

RF power amplifier bias

Time of flight module supply

GENERAL DESCRIPTION

The ADP5076 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 ADP5076 operates at a pin selected 1.2 MHz or 2.4 MHz

switching frequency. The ADP5076 can synchronize with an

external oscillator from 1.0 MHz to 2.6 MHz to ease noise

filtering in sensitive applications. Both regulators implement

programmable slew rate control circuitry for the metal-oxide

semiconductor field effect transistor (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 ADP5076 includes a fixed internal or resistor programmable

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

Other key safety features in the ADP5076 include overcurrent

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

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

The ADP5076 is available in a 20-ball wafer level chip scale

package (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

1.2

16-lead LFCSP (3 mm ×

3 mm)

ADP5074

2.4

16-lead LFCSP (3 mm ×

3 mm)

ADP5075

0.8

12-ball WLCSP

(1.61 mm × 2.18 mm)

ADP5076

2.0

1.2

20-ball WLCSP

(1.61 mm × 2.18 mm)

FUNCTIONAL BLOCK DIAGRAM

ADP5076

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.