2 A/3 A, 20 V, 700 kHz,

Nonsynchronous Step-Down Regulators

ADP2302/ADP2303

Rev. 0

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FEATURES

Wide input voltage range: 3.0 V to 20 V

Maximum load current

2 A for ADP2302

3 A for ADP2303

±1.5% output accuracy over temperature

Output voltage down to 0.8 V

700 kHz switching frequency

Current-mode control architecture

Automatic PFM/PWM mode

Precision enable pin with hysteresis

Integrated high-side MOSFET

Integrated bootstrap diode

Internal compensation and soft start

Power-good output

Undervoltage lockout (UVLO)

Overcurrent protection (OCP)

Thermal shutdown (TSD)

8-lead SOIC package with exposed paddle

APPLICATIONS

Intermediate power rail conversion

DC-to-DC point of load applications

Communications and networking

Industrial and instrumentation

Healthcare and medical

Consumer

TYPICAL APPLICATIONS CIRCUIT

VIN

ADP2302/

ADP2303

PGOOD

EN

GND

OFF

ON

BST

SW

FB

Figure 1. Typical Application Circuit

40

50

60

70

80

90

100

0

0.5

1.0

1.5

2.0

2.5

3.0

OUTPUT CURRENT (A)

INDUCTOR: VLF10040T

DIODE: SSB43L

GENERAL DESCRIPTION

The ADP2302/ADP2303 are fixed frequency, current-mode

control, step-down, dc-to-dc regulators with an integrated

power MOSFET. The ADP2302/ADP2303 can run from an

input voltage of 3.0 V to 20 V, which makes them suitable for a

wide range of applications. The output voltage of the ADP2302/

ADP2303 can be down to 0.8 V for the adjustable version, while

the fixed output version is available in preset output voltage

options of 5.0 V, 3.3 V, and 2.5 V. The 700 kHz operating

frequency allows small inductor and ceramic capacitors to be

used, providing a compact solution. Current mode control

provides fast and stable line and load transient performance.

The ADP2302/ADP2303 have integrated soft start circuitry to

prevent a large inrush current at power-up. The power-good

signal can be used to sequence devices that have an enable input.

The precision enable threshold voltage allows the part to be

easily sequenced from other input/output supplies. Other key

features include undervoltage lockout (UVLO), overvoltage

protection (OVP), thermal shutdown (TSD), and overcurrent

protection (OCP).

The ADP2302/ADP2303 devices are available in the 8-lead,