Datasheet

ENABLE
ACC_PWR
GND
VCC
POK ACC_DET
A1
B1
C1
A2
B2
C2
LM34902/4
CPU
Accessory
200k
Accessory
Detect
VCC: 2.8V to 5.3V
200k
Evaluation Module Operation www.ti.com
Figure 1. Typical System Schematic
Table 1. Power Switch Truth Table
Input
(1)
Output
Current Limit T
J
Limit PFET Switch
ENABLE ACC_DET 2.8V < VCC < 5.3V POK
Detected Exceeded Status
0 x No No Yes Open Open Drain
x 1 No No Yes Open Open Drain
0 to 1 0 No No Yes On Grounded
0 to 1 0 Yes No Yes Current Grounded
Limited
x x x Yes 2.2V < VCC < 5.3V Open Open Drain
0 x x No 2.2V < VCC < 2.8V Open Open Drain
(1)
x = stands for "don't care".
2
AN-2266 LM34902/4 Current Limited Power Switch Evaluation Module SNVU156A–July 2012–Revised May 2013
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