2.4 A, DC-to-DC Inverting Regulator

Data Sheet

ADP5074

Rev. A

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FEATURES

Wide input voltage range: 2.85 V to 15 V

Integrated 2.4 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

Precision enable control

Power-good output

UVLO, OCP, OVP, and TSD protection

3 mm × 3 mm, 16-lead LFCSP

−40°C to +125°C junction temperature

Supported by the ADIsimPower tool set

APPLICATIONS

Bipolar amplifiers, ADCs, digital-to-analog converters

(DACs), and multiplexers

High speed converters

Radio frequency (RF) power amplifier (PA) bias

Optical modules

TYPICAL APPLICATION CIRCUIT

L1

ADP5074

COMP

VREG

SS

EN

GND

AVIN

PVIN

SLEW

SYNC/FREQ

FB

SW

VREF

ON

OFF

PWRGD

PWRGD

D1

Figure 1.

GENERAL DESCRIPTION

The ADP5074 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 ADP5074 operates at a pin selected 1.2 MHz/2.4 MHz

switching frequency. The ADP5074 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 ADP5074 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. A power good pin is

available to indicate the output is stable.

Other key safety features in the ADP5074 include overcurrent

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

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

The ADP5074 is available in a 16-lead LFCSP and is rated for a

−40°C to +125°C operating 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 TSSOP

ADP5071

2.0

1.2

20-lead LFCSP (4 mm ×

4 mm) and TSSOP

ADP5073

Not

applicable

1.2

16-lead LFCSP (3 mm ×

3 mm)

ADP5074

Not

applicable

2.4

16-lead LFCSP (3 mm ×

3 mm)

ADP5075

Not

applicable

0.8

12-ball WLCSP

(1.61 mm × 2.18 mm)