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LTC1704B Datasheet(PDF) 6 Page - Linear Technology

Part # LTC1704B
Description  550kHz Synchronous Switching Regulator Controller Plus Linear Regulator Controller
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1704B Datasheet(HTML) 6 Page - Linear Technology

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LTC1704/LTC1704B
6
1704bfa
TYPICAL PERFOR A CE CHARACTERISTICS
VOUTREG Load Regulation
Linear Regulator Dropout Voltage
vs Temperature
IOUTREG (A)
0
–0.5
0
0.5
1.6
1704 G18
–1.0
–1.5
0.4
0.8
1.2
2
–2.0
–2.5
–3.0
– 0.03
0.03
0
–0.07
–0.10
–0.13
–0.17
–0.20
TA = 25°C
VOUTREG = 1.5V
IREGILM = 9µA
QEXT = D44H11
TEMPERATURE (
°C)
–50
1.0
25
1704 G19
0.7
0.5
–25
0
50
0.4
0.3
1.1
0.9
0.8
0.6
75
100
125
IREGDR = –30mA
VREGDR = 3.3V
VOUTREG 0.1A to 2.1A Load Step
50
µs/DIV
1704 G20
CH1: VOUTREG = 1.5V, AC 50mV/DIV
CH2: 0.1A to 2.1A LOAD, 1A DIV
Minimum VCC vs VOUTREG
VOUTREG (V)
0.9
3.0
3.5
4.0
4.5
5.0
5.5
1.3
1.7
2.1
2.5
1704 G21
2.9
3.3
IREGILM = 9µA
IOUTREG = 2A
∆VOUTREG = –1%
QEXT = D44H11
TA = –40°C
TA = 25°C
CDELAY (pF)
0
300
900
1000
1100
6000
8000
1704 G22
100
700
500
200
800
0
600
400
2000
4000
10000
TA = 25°C
VOUTREG = 1.5V
IREGILM = 6.2µA
IREGILM = 9µA
IREGILM (µA)
0
35
30
25
20
15
10
5
0
610
1704 G23
24
812
Linear Regulator Start-Up Time
vs CDELAY
IREGDR vs IREGILM
Linear Regulator Current Limit
Threshold vs Temperature
TEMPERATURE (
°C)
–50
1.0
1.5
2.0
2.5
3.0
–25
0
25
50
1704 G24
75
100
125
VINREG = 1.8V
VOUTREG = 1.5V
IREGILM = 9µA
QEXT = D44H11
IOUTREG (A)
0
0
0.5
1.0
1.5
2.0
0.5
1
1.5
2
1704 G25
2.5
3
TA = 25°C
VINREG = 1.8V
VOUTREG = 1.5V
IREGILM = 9µA
QEXT = D44H11
VOUTREG vs Load Current
VREGFB (V)
0
0
5
10
15
20
0.2
0.4
0.6
0.8
1704 G28
25
30
0.1
0.3
0.5
0.7
IREGILM = 9µA
IREGILM = 6.2µA
TA = 25°C
VREGDR = 0V
IREGDR vs VREGFB
VOUT
ILOAD



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