ACE701CA

Small Package PFM Control Step-Up DC/DC Converter

VER 1.2

1

Description

The ACE701CA Series is a CMOS PFM-control step-up switching DC/DC converter. The PFM

controller allows the duty ratio to be automatically switched according to the load (light load: 66%, high

output current: 78%), enabling products with a low ripple over a wide range, high efficiency, and high

output current. With the ACE701CA Series, a step-up switching DC/DC converter can be configured by

using an external coil, capacitor, and diode. The built-in MOSFET is turned off by a protection circuit when

the voltage at the LX pin exceeds the limit to prevent it from being damaged. This feature, along with the

mini package and low current consumption, makes the ACE701CA Series ideal for applications such as

the power supply unit of portable equipment.

Features





Duty ratio: 66/78%, built in auto switching type PFM controller



External parts: Coil, capacitor, diode



Output voltage: Settable to between 1.8V to 6.0 V in 0.1 V steps



Accuracy of ±2%



High efficiency：±85%（typ.）



Standard function (product type A)



Shutdown function (product type C,D)



External transistor type available (product type B、D)

Application



Digital cameras



Electronic notebooks and PDAs



Portable CD/MD players



Cameras, video equipment



Communications equipment



Power supply for microcomputers

Absolute Maximum Ratings

Parameter

Symbol

Max

Unit

V

EN pin voltage

EN

V

LX pin voltage

V

LX pin current

1000

mA

Power dissipation

SOT-23-3

PD

250

mW

SOT-23-5

250

mW

SOT-89-3

500

mW

TO-92

500

mW

Operating temperature

-40 ~+85

℃

Storage temperature

-40 ~+125

℃

Soldering Temperature & Time

260°C, 10s