AXP209 datasheet(33/45 Pages) ETC2

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AXP209

Enhanced single Cell Li-Battery and Power System Management IC

10.8 REG 27H: DC-DC3 output voltage setting

The default value: XXH

Bit

Description

R / W

Default

value

Reserved, can not be changed

6-0 DC-DC3 output voltage setting

0.7-3.5V, 25mV / step

Vout = [0.7+ (Bit6-0) * 0.025] V

10.9 REG 28H: LDO2 / 4 output voltage setting

The default value: XXH

Bit

Description

R / W

Default

value

7-4

LDO2 output voltage setting

1.8-3.3V, 100mV / step

Vout = [1.8+ (Bit7-4) * 0.1] V

3-0

LDO4 output voltage setting

1.25, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9,

2.0, 2.5, 2.7, 2.8, 3.0, 3.1, 3.2, 3.3

10.10 REG 29H: LDO3 output voltage setting

The default value: XXH

Bit

Description

R / W

Default

value

LDO3 Mode selection:

0:LDO Mode, the voltage is set by [6: 0]

1:enable/disable control mode, voltage is determined by LDO3IN.

6-0

LDO3 output voltage setting

0.7-2.275V,25mV / step

Vout = [0.7+ (Bit6-0) * 0.025] V

10.11 REG 30H: VBUS-IPSOUT Power Path Management

The default value: 6XH

Bit

Description

R /

Default

value

VBUS-IPSOUT Path selection control signal source

0:By N_VBUSEN pin controls whether to enable this path

1: VBUS-IPSOUT enabled, regardless of N_VBUSEN State

VBUS VHOLD voltage limiting control

0: No voltage drop limit ; 1: Limit the voltage drop

5-3

VHOLD Set

VHOLD= [4.0+ (Bit5-3) * 0.1] V

100

Reserved, can not be changed

1-0

VBUS current-limit selection when current-limit is enabled

00:900mA ; 01:500mA; 10:100mA; 11:no limit

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