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LTC3700 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3700
Description  Constant Frequency Step-Down DC/DC Controller with LDO Regulator
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3700 Datasheet(HTML) 5 Page - Linear Technology

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5
LTC3700
3700f
TYPICAL PERFOR A CE CHARACTERISTICS
VIN INPUT VOLTAGE (V)
2
3
4
5
6
7
8
910
3700 G09
300
270
240
210
180
150
120
90
60
30
0
VIN2 = 0V
VPGOOD = 100mV
TA = 25°C
PGOOD RON vs Input Voltage
LDO Pass FET RON vs Input
Voltage
VIN2 INPUT VOLTAGE (V)
2
2.5
3
3.5
4
4.5
5
5.5
6
3700 G08
4.0
3.7
3.4
3.1
2.8
2.5
2.2
1.9
1.6
1.3
1.0
VIN = 0
ILDO = 100mA
TA = 25°C
TEMPERATURE (
°C)
–55 –35 –15
5
25
45
65
85 105 125
3700 G06
850
840
830
820
810
800
790
780
770
760
750
VIN2 = 4.2V
LDO = VFB2
ILOAD = 100mA
ILOAD = 10mA
ILOAD = 10µA
ILOAD = 1mA
VIN2 INPUT VOLTAGE (V)
2.4 2.85 3.3 3.75 4.2 4.65 5.1 5.55
6
3700 G07
850
840
830
820
810
800
790
780
770
760
750
TA = 25°C
LDO = VFB2
ILOAD = 100mA
ILOAD = 1mA
ILOAD = 10µA
ILOAD = 10mA
VFB2 Voltage vs Temperature
LDO Line Regulation (VFB2
Voltage vs Supply)
LDO REGULATOR
Load Transient Response
LDO Supply Current
vs Input Voltage
VIN2 INPUT VOLTAGE (V)
2
20
30
50
60
70
120
90
3
4
4.5
3700 G11
40
100
110
80
2.5
3.5
5
5.5
6
VIN = 0V
VIN = 9.8V
LDO = VFB2
ILDO = 10µA
TA = 25°C
150
100
50
0
0
ILDO (mA)
50mA/DIV
∆VLDO
20mV/DIV
AC COUPLED
TA = 25°C20µs/DIV
3700 G12
VIN2 = 3.3V
VLDO = 2.5V
CLDO = 10µF


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