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[v1-03] 2015-Aug-10

AS3715 − Detailed Description – Power Management Functions

Figure 34:

Low Power LDO External Components

Low Power LDO External Components: Shows the external component parameter of the low power V2_5 linear

regulator.

DCDC Step-up Converter

Description

The DC/DC Step Up converter is a high efficiency current mode

PWM regulator, which provides an output voltage dependent

on the maximum VDS voltage of the external transistor, and

maximum load current selectable by the external shunt resistor.

For Example:

• 5V, 0.5-1A @ 1Mhz

• 25V, 50mA @ 1MHz

• 40V, 20mA @ 500kHz

A constant switching frequency results in a low noise on supply

and output voltage.

Three feedback regulation modes are supported:

• Current feedback (all three current sinks can be selected)

• Current feedback with automatic feedback selection

• Voltage feedback

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

CV2_5

Output capacitor

Ceramic X5R or X7R

0.7

μF

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