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CS51221 Datasheet PDF : 14 Pages
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CS51221
MAXIMUM RATINGS
Rating
Value
Unit
Operating Junction Temperature, TJ
Internally
Limited
−
Lead Temperature Soldering:
Reflow: (SMD styles only) (Note 1) 230 peak
°C
Storage Temperature Range, TS
−65 to +150 °C
ESD (Human Body Model)
2.0
kV
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. 60 second maximum above 183°C.
MAXIMUM RATINGS
Pin Name
Gate Drive Output
Current Sense Input
Timing Resistor/Capacitor
Feed Forward
Error Amp Output
Feedback Voltage
Sync Input
Undervoltage
Overvoltage
Current Set
Soft−Start
Logic Section Supply
Power Section Supply
Reference Voltage
Power Ground
Logic Ground
Pin Symbol
GATE
ISENSE
RTCT
FF
COMP
VFB
SYNC
UV
OV
ISET
SS
VCC
VC
VREF
PGND
LGND
VMAX
15 V
6.0 V
6.0 V
6.0 V
6.0 V
6.0 V
6.0 V
6.0 V
6.0 V
6.0 V
6.0 V
15 V
15 V
6.0 V
N/A
N/A
VMIN
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
−0.3 V
N/A
N/A
ISOURCE
1.0 A Peak, 200 mA DC
1.0 mA
1.0 mA
1.0 mA
10 mA
1.0 mA
10 mA
1.0 mA
1.0 mA
1.0 mA
1.0 mA
10 mA
10 mA
lnternally Limited
1.0 A Peak, 200 mA DC
N/A
ISINK
1.0 A Peak, 200 mA DC
1.0 mA
10 mA
25 mA
20 mA
1.0 mA
10 mA
1.0 mA
1.0 mA
1.0 mA
10 mA
50 mA
1.0 A Peak, 200 mA DC
10 mA
N/A
N/A
ELECTRICAL CHARACTERISTICS (−40°C < TA < 85°C; −40°C < TJ < 125°C; 3.0 V < VC < 15 V; 4.7 V < VCC < 15 V;
RT = 12 k; CT = 390 pF; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Start/Stop Voltages
Start Threshold
−
4.4
4.6
4.7
V
Stop Threshold
−
3.2
3.8
4.1
V
Hysteresis
Start−Stop
400
850
1400
mV
ICC @ Startup
Supply Current
VCC < UVL Start Threshold
−
38
75
mA
ICC Operating
IC Operating
IC Operating
−
1.0 nF Load on GATE
No Switching
−
9.5
14
mA
−
12
18
mA
−
2.0
4.0
mA
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