LX8816 查看數據表（PDF） - Microsemi Corporation
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LX8816 Datasheet PDF : 9 Pages
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LX8816
TM
®
Dual Channel 1A Low Dropout Regulator
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
LOAD TRANSIENT RESPONSE
VIN = 20µF Ceramic, ESR= 45mΩ; V1,V2 = 10µF Ceramic, ESR= 75mΩ
50mV
/ DIV
50mV
/ DIV
V1 = 1.5V 180Ω Load
V2 = 3.3V 1A Step Load
LOAD TRANSIENT RESPONSE
VIN = 22µF Tantalum, ESR=232mΩ; V1,V2 = 10µF Tantalum, ESR=198mΩ
50mV
/ DIV
VIN = 5V
50mV
/ DIV
V1 = 1.5V
50mV
/ DIV
V2 = 3.3V 1A Step Load
1A
1mA
500mV
/ DIV
1V /
DIV
2µs / DIV
TURN ON CHARACTERISTICS
V2 = 3.3V
VIN = 5V
500m
V / DIV
V1 = 1.5V
1A
0mA
20mV(A
C) / DIV
500mV
/ DIV
2µs / DIV
CURRENT LIMIT RESPONSE
V1 = 1.5V
V2 = 3.3V
1.2A
Rising Load
On V2
100µs / DIV
RIPPLE REJECTION VS. FREQUENCY
VIN = 5V, CIN = 22µF, COUT1,2 = 10µF, V2=3.3V, IOUT2=1A
45
40
35
30
25
20
15
10
5
0
100
1000
10000
100000
FREQUENCY (HZ)
200mA
/ DIV
100µs / DIV
VOUT AND ICHIP VS. VIN RAMP
5
6
4.5
Ichip, ma
5
4
V2,(Rext=13K ohms)
3.5
V1, adj(Rext=909 ohms)
4
3
2.5
3
2
2
1.5
1
1
0.5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
VIN (Volts)
Copyright © 2000
Rev. 1.2c, 2005-05-18
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
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