CS51221
http://onsemi.com
3
MAXIMUM RATINGS*
Rating Value Unit
Operating Junction Temperature, T
J
Internally
Limited
–
Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) 230 peak °C
Storage Temperature Range, T
S
–65 to +150 °C
ESD (Human Body Model) 2.0 kV
1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
MAXIMUM RATINGS
Pin Name Pin Symbol V
MAX
V
MIN
I
SOURCE
I
SINK
Gate Drive Output GATE 15 V –0.3 V 1.0 A Peak, 200 mA DC 1.0 A Peak, 200 mA DC
Current Sense Input I
SENSE
6.0 V –0.3 V 1.0 mA 1.0 mA
Timing Resistor/Capacitor R
T
C
T
6.0 V –0.3 V 1.0 mA 10 mA
Feed Forward FF 6.0 V –0.3 V 1.0 mA 25 mA
Error Amp Output COMP 6.0 V –0.3 V 10 mA 20 mA
Feedback Voltage V
FB
6.0 V –0.3 V 1.0 mA 1.0 mA
Sync Input SYNC 6.0 V –0.3 V 10 mA 10 mA
Undervoltage UV 6.0 V –0.3 V 1.0 mA 1.0 mA
Overvoltage OV 6.0 V –0.3 V 1.0 mA 1.0 mA
Current Set I
SET
6.0 V –0.3 V 1.0 mA 1.0 mA
Soft Start SS 6.0 V –0.3 V 1.0 mA 10 mA
Logic Section Supply V
CC
15 V –0.3 V 10 mA 50 mA
Power Section Supply V
C
15 V –0.3 V 10 mA 1.0 A Peak, 200 mA DC
Reference Voltage V
REF
6.0 V –0.3 V lnternally Limited 10 mA
Power Ground PGND N/A N/A 1.0 A Peak, 200 mA DC N/A
Logic Ground LGND N/A N/A N/A N/A
ELECTRICAL CHARACTERISTICS (–40°C < T
A
< 85°C; –40°C < T
J
< 125°C; 3.0 V < V
C
< 15 V; 4.7 V < V
CC
< 15 V;
R
T
= 12 k; C
T
= 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
I
CC
@ Startup V
CC
< UVL Start Threshold – 38 75 µA
Supply Current
I
CC
Operating – – 9.5 14 mA
I
C
Operating 1.0 nF Load on GATE – 12 18 mA
I
C
Operating No Switching – 2.0 4.0 mA
Reference Voltage
Total Accuracy
0 mA < I
REF
< 2.0 mA 3.2 3.3 3.4 V
