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AXP209 Datasheet(PDF) 23 Page - List of Unclassifed Manufacturers

Part No. AXP209
Description  Enhanced single Cell Li-Battery and Power System Management IC
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Maker  ETC2 [List of Unclassifed Manufacturers]
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AXP209 Datasheet(HTML) 23 Page - List of Unclassifed Manufacturers

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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
9.5 Multi-channel power output
AXP209 provides multiple Output voltages as follows:
Output
path
Type
Default voltage
Application
examples
Drive capability
DCDC2
BUCK
Configurable
1.25Vcore
1600 mA
DCDC3
BUCK
Configurable
2.5Vddr
700 mA
LDO1
LDO
Configurable
RTC
30 mA
LDO2
LDO
Configurable
Analog / FM
200 mA
LDO3
LDO
Configurable
1.3V PLL
200 mA
LDO4
LDO
Configurable
1.8V HDMI
200 mA
LDO5
LDO
Configurable
Vmic
50 mA
AXP209 comes with two synchronous step-down DC-DCs, five LDOs, as well as multiple timing and
controlling methods. The operating frequency of DC-DC converters is 1.5MHz by default, which is
adjustable via registers. External small inductors and capacitors can be connected as well. In addition,
both DC-DCs can be set in PWM mode or auto mode (automatically switchable according to the
AXP209 load). See register REG80H.
DC-DC2 / 3
DCDC3 output voltage ranges from 0.7 V to 3.5V, and output voltage of DCDC2 is ranged from
0.7-2.275V, which can be programmed via registers.(refer to “Register REG23H 27H”).
DCDC2/3 output capacitor is recommended to use small ESR ceramic capacitors above 10uF X7R;
when the output voltage is set above 2.5V,2.2uH inductors is recommended; when the output
voltage is set under 2.5V, 4.7uH inductors is recommended. Besides, the inductor saturation current
should be more than 50% of the largest demanded current.
The following is a list of recommended inductor-capacitor:
Inductor
Model
Current specifications
DC resistance
Murata LQH55PN2R2NR0
2100mA@2.2uH
30mOhm
Murata LQH55PN4R7NR0
1400mA@4.7uH
60mOhm
Murata LQH44PN2R2MP0
2000mA@2.2uH
49mOhm
Murata LQH44PN4R7MP0
1700mA@2.2uH
80mOhm
TDK VLF5010ST-2R2M2R3
2700mA@2.2uH
41mOhm
TDK VLF5014ST-4R7M1R7
1700mA@4.7uH
98mOhm
TDK SLF6045T-4R7N2R4-3PF
2400mA@4.7uH
27mOhm
Capacitor
Model
Temperature characteristics
Tolerance
TDK C2012X5R0J475K
X5R / X7R
10%@4.7uF
TDK C2012X5R0J106K
X5R / X7R
10% @ 10uF
Murata GRM31E71A475K
X7R
10%@4.7uF
Murata GRM21E71A106K
X7R
10% @ 10uF
Murata GRM31E71A106K
X7R
10% @ 10uF
Confidential
Page 23/45


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