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CS51411_07 Datasheet(PDF) 4 Page - ON Semiconductor

Part No. CS51411_07
Description  1.5 A, 260 kHz and 520 kHz, Low Voltage Buck Regulators with External Bias or Synchronization Capability
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS51411, CS51412, CS51413, CS51414
http://onsemi.com
4
MAXIMUM RATINGS
Pin Name
VMax
VMIN
ISOURCE
ISINK
VIN
40 V
βˆ’0.3 V
N/A
4.0 A
BOOST
40 V
βˆ’0.3 V
N/A
100 mA
VSW
40 V
βˆ’0.6 V/βˆ’1.0 V, t < 50 ns
4.0 A
10 mA
VC
7.0 V
βˆ’0.3 V
1.0 mA
1.0 mA
SHDNB
7.0 V
βˆ’0.3 V
1.0 mA
1.0 mA
SYNC
7.0 V
βˆ’0.3 V
1.0 mA
1.0 mA
BIAS
7.0 V
βˆ’0.3 V
1.0 mA
50 mA
VFB
7.0 V
βˆ’0.3 V
1.0 mA
1.0 mA
GND
7.0 V
βˆ’0.3 V
50 mA
1.0 mA
ELECTRICAL CHARACTERISTICS (βˆ’40
Β°C < TJ < 125Β°C (CS51411E/2E/3E/4E); βˆ’40Β°C < TA < 85Β°C (CS51411E/2E/3E/4E);
0
Β°C < TA < 70Β°C (CS51411G/2G/3G/4G), 4.5 V< VIN < 40 V; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Oscillator
Operating Frequency
CS51411/CS51412
224
260
296
kHz
Operating Frequency
CS51413/CS51414
446
520
594
kHz
Frequency Line Regulation
βˆ’
βˆ’
0.05
0.15
%/V
Maximum Duty Cycle
βˆ’
85
90
95
%
VFB Frequency Foldback Threshold
βˆ’
0.29
0.32
0.36
V
PWM Comparator
Slope Compensation Voltage
CS51411/CS51412, Fix VFB, DVC/DTON
CS51413/CS51414
8.0
25
17
50
26
75
mV/
ms
mV/
ms
Minimum Output Pulse Width
CS51411/CS51412, VFB to VSW
CS51413/CS51414, VFB to VSW
βˆ’
βˆ’
150
βˆ’
300
230
ns
ns
Power Switch
Current Limit
VFB > 0.36 V
1.6
2.3
3.0
A
Foldback Current
VFB < 0.29 V
0.9
1.5
2.1
A
Saturation Voltage
IOUT = 1.5 A, VBOOST = VIN + 2.5 V
0.4
0.7
1.0
V
Current Limit Delay
(Note 2)
βˆ’
120
160
ns
Error Amplifier
Internal Reference Voltage
βˆ’
1.244
1.270
1.296
V
Reference PSRR
(Note 2)
βˆ’
40
βˆ’
dB
FB Input Bias Current
βˆ’
βˆ’
0.02
0.1
mA
Output Source Current
VC = 1.270 V, VFB = 1.0 V
15
25
35
mA
Output Sink Current
VC = 1.270 V, VFB = 2.0 V
15
25
35
mA
Output High Voltage
VFB = 1.0 V
1.39
1.46
1.53
V
Output Low Voltage
VFB = 2.0 V
5.0
20
60
mV
Unity Gain Bandwidth
(Note 2)
βˆ’
500
βˆ’
kHz
Open Loop Amplifier Gain
(Note 2)
βˆ’
70
βˆ’
dB
Amplifier Transconductance
(Note 2)
βˆ’
6.4
βˆ’
mA/V
2. Guaranteed by design, not 100% tested in production.




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