CS51411, CS51412, CS51413, CS51414
http://onsemi.com
4
MAXIMUM RATINGS
Pin Name V
Max
V
MIN
I
SOURCE
I
SINK
V
IN
40 V −0.3 V N/A 4.0 A
BOOST 40 V −0.3 V N/A 100 mA
V
SW
40 V −0.6 V/−1.0 V, t < 50 ns 4.0 A 10 mA
V
C
7.0 V −0.3 V 1.0 mA 1.0 mA
SHDNB 7.0 V −0.3 V 1.0 mA 1.0 mA
SYNC 7.0 V −0.3 V 1.0 mA 1.0 mA
BIAS 7.0 V −0.3 V 1.0 mA 50 mA
V
FB
7.0 V −0.3 V 1.0 mA 1.0 mA
GND 7.0 V −0.3 V 50 mA 1.0 mA
ELECTRICAL CHARACTERISTICS (−40°C < T
J
< 125°C (CS51411E/2E/3E/4E); −40°C < T
A
< 85°C (CS51411E/2E/3E/4E);
0°C < T
A
< 70°C (CS51411G/2G/3G/4G), 4.5 V< V
IN
< 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 − − 0.05 0.15 %/V
Maximum Duty Cycle − 85 90 95 %
V
FB
Frequency Foldback Threshold − 0.29 0.32 0.36 V
PWM Comparator
Slope Compensation Voltage
CS51411/CS51412, Fix V
FB,
DV
C
/DT
ON
CS51413/CS51414
8.0
25
17
50
26
75
mV/ms
mV/ms
Minimum Output Pulse Width CS51411/CS51412, V
FB
to V
SW
CS51413/CS51414, V
FB
to V
SW
−
−
150
−
300
230
ns
ns
Power Switch
Current Limit
V
FB
> 0.36 V 1.6 2.3 3.0 A
Foldback Current V
FB
< 0.29 V 0.9 1.5 2.1 A
Saturation Voltage I
OUT
= 1.5 A, V
BOOST
= V
IN
+ 2.5 V 0.4 0.7 1.0 V
Current Limit Delay (Note 4) − 120 160 ns
Error Amplifier
Internal Reference Voltage
− 1.244 1.270 1.296 V
Reference PSRR (Note 4) − 40 − dB
FB Input Bias Current − − 0.02 0.1
mA
Output Source Current V
C
= 1.270 V, V
FB
= 1.0 V 15 25 35
mA
Output Sink Current V
C
= 1.270 V, V
FB
= 2.0 V 15 25 35
mA
Output High Voltage V
FB
= 1.0 V 1.39 1.46 1.53 V
Output Low Voltage V
FB
= 2.0 V 5.0 20 60 mV
Unity Gain Bandwidth (Note 4) − 500 − kHz
Open Loop Amplifier Gain (Note 4) − 70 − dB
Amplifier Transconductance (Note 4) − 6.4 − mA/V
4. Guaranteed by design, not 100% tested in production.
