APE8937_14 Datasheet, PDF (12/14 Pages) Advanced Power Electronics Corp. – ULTRA LOW ON RESISTANCE

Advanced Power
Electronics Corp.
APE8937
APPLICATION INFORMATION
On/Off Control
The load switch is controlled by the EN pin. The EN pin is active high and has a low threshold making it
capable of interfacing with low voltage signals. The EN pin can be used with standard 1.2V, 1.8V, 2.5V or 3.3V
GPIO logic threshold. Do not leave the EN pin float.
Output Rise Time Control
The rise time of VOUT is adjustable by an external capacitor on the CT pin. The rise time shows on below
Table 1 are typical measured value. Please refer it for determined rise time.
C_T (nF)
VOUT Rise Time, t_R(µs),
10%~90%, V_BIAS=V_EN=5V, C_IN=1uF, C_OUT=0.1µF, R_L=10Ω
VIN=0.8V VIN=1.05V VIN=1.2V VIN=1.5V VIN=1.8V VIN=2.5V VIN=3.3V
0
29
38
40
48
53
63
76
0.22
85
114
125
168
190
260
329
0.47
151
208
218
287
334
435
601
1
302
397
427
548
673
926
1247
2.2
610
865
924
1227
1448
1979
2736
4.7
1228
1723
1872
2450
3000
4043
5583
10
2227
3418
3624
4894
5689
8159
10830
<Table 1>
VIN=5V
100
501
946
1911
4176
8681
16910
Input Capacitor
An input capacitor is recommended to be placed between VIN and GND to limit the voltage drop on the input
supply during high current application.
Output Capacitor
Setting a C_IN greater than the C_OUT is highly recommended. Since the internal body diode is in the NMOS
switch, this prevents the current flows through the body diode from VOUT to VIN when the system supply is
removed.
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