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LTC7149 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC7149
Description  60V, 4A Synchronous Step-Down Regulator for Inverting Outputs
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC7149 Datasheet(HTML) 5 Page - Linear Technology

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LTC7149
5
7149fa
For more information www.linear.com/LTC7149
TYPICAL PERFORMANCE CHARACTERISTICS
ISET Voltage Line Regulation
Quiescent Current vs Temperature
Shutdown Current vs VIN
Load Regulation
ISET Current vs Temperature
ISET Current vs VISET
IOUT (A)
0
99
4
7149 G01
98
2
1
3
101
100
FC MODE
Burst Mode Operation
VIN = 24V
VOUT = –5V
TEMPERATURE (°C)
–55
49.7
125
7149 G02
49.5
–15
–35
5
45
25
65
105
85
50.5
49.9
50.1
50.3
VISET
0
47
24
7149 G03
46
4
8
16
12
20
51
48
49
50
VIN = 24V
VIN (V)
0
4.96
60
7149 G04
4.95
10
20
40
30
50
5.01
4.97
4.99
5.00
RISET = 100k
TEMPERATURE (°C)
–55
100
125
7149 G05
0
–15
–35
5
45
25
65
105
85
500
200
300
400
SHUTDOWN
SLEEP
VIN (V)
0
4
60
7149 G06
0
10
20
40
30
50
20
8
12
16
RDS(ON) vs Temperature
Transient Response, CCM
Transient Response, DCM
TEMPERATURE (°C)
–55
40
125
7149 G07
0
–35 –15
65
105
85
5
45
25
200
80
120
160
MTOP
MBOT
VIN = 24V, VOUT = –3.3V
IOUT = 0A to 3A, L = 2.2H, fSW = 1MHz
RITH = 1kΩ, CITH = 2.2nF, CITHP = 100pF
COUT = 2 × 22F + 150F
20µs/DIV
VOUT
AC–COUPLED
100mV/DIV
IL
3A/DIV
ILOAD
3A/DIV
7149 G08
VIN = 24V, VOUT = –3.3V
IOUT = 0.2A to 2A, L = 2.2H, fSW = 1MHz
RITH = 1kΩ, CITH = 2.2nF, CITHP = 100pF
COUT = 2 × 22F + 150F
20µs/DIV
VOUT
AC–COUPLED
100mV/DIV
IL
2A/DIV
ILOAD
2A/DIV
7149 G09



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