800 mA, DC-to-DC Inverting Regulator

Data Sheet

ADP5075

Rev. B

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FEATURES

Wide input voltage range: 2.85 V to 15 V

Integrated 800 mA 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

Precision enable control

UVLO, OCP, OVP, and TSD protection

1.61 mm × 2.18 mm, 12-ball WLCSP

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

Supported by the ADIsimPower tool set

APPLICATIONS

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

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

Charge coupled device (CCD) bias supplies

Optical module supplies

Radio frequency (RF) power amplifier (PA) bias

TYPICAL APPLICATION CIRCUIT

ADP5075

COMP

VREG

SS

EN

GND

AVIN

PVIN

L1

SLEW

SYNC/FREQ

FB

SW

VREF

D1

ON

OFF

Figure 1.

GENERAL DESCRIPTION

The ADP5075 is a high performance dc-to-dc inverting regulator

used to generate negative supply rails.

The input voltage range of 2.85 V to 15 V supports a wide variety of

applications. The integrated main switch enables the generation of

an adjustable negative output voltage down to 39 V below the input

voltage.

The ADP5075 operates at a pin selected 1.2 MHz/2.4 MHz

switching frequency. The ADP5075 can synchronize with an

external oscillator from 1.0 MHz to 2.6 MHz to ease noise

filtering in sensitive applications. The regulator implements

programmable slew rate control circuitry for the MOSFET

driver stage to reduce electromagnetic interference (EMI).

The ADP5075 includes a fixed internal or resistor programmable

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

shutdown, the regulator completely disconnects the load from the

input supply to provide a true shutdown.

Other key safety features in the ADP5075 include overcurrent

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

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

The ADP5075 is available in a 12-ball WLCSP and is rated for a

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

Table 1. Related Devices

Device

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

ADP5075

Not

applicable

0.8

12-ball WLCSP

(1.61 mm × 2.18 mm)