CAT37_08 Datasheet, PDF (3/13 Pages) Texas Instruments – CMOS White LED Driver Boost Converter

CAT37
ABSOLUTE MAXIMUM RATINGS ⁽¹⁾
Parameter
V_IN, FB, ¯S¯H¯D¯N¯ voltage
SW voltage
Storage Temperature Range
Junction Temperature
Lead Soldering Temperature (10 secs)
ESD Rating – Human Body Model
Rating
Unit
8
V
20
V
-65 to +160
ºC
125
ºC
300
ºC
2000
V
RECOMMENDED OPERATING CONDITIONS
Parameter
Range
Unit
V_IN
Ambient Temperature Range
2.5 to 7
V
-40 to +85
°C
Inductor L1
6.8 ± 20% typical
µH
Input Capacitor C1
1.0 ± 20% typical
µF
Output Capacitor C2
1.0 ± 20% typical
µF
I_LED with 1 to 4 LEDs in series
0 to 20
mA
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
Over recommended operating conditions unless otherwise specified. T_A = 25ºC, V_IN = 3V and V_{¯S¯H¯D¯N¯} = 3V.
Symbol
I_Q
I_SD
V_FB
I_FB
I_SHDN
f_SW
DC
I_SWL
Parameter
Input Voltage Range
Quiescent Current
Shutdown Current
FB Pin Voltage
FB Pin Leakage Current
Shutdown High Threshold
Shutdown Low Threshold
Shutdown Pin Current
Boost Converter Frequency
Maximum Switch Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Efficiency
Conditions
V_FB = 0.2 V
V_SHDN = 0 V
4 LEDs at 15 mA
I_SW = 300 mA
Switch Off, V_SW = 5 V
Figure 1 with specified components
Min
2.5
85
0.85
0.8
90
400
Typ
0.5
0.05
95
1
1.2
95
550
150
0.01
83
Max Units
7
V
0.7 mA
1
µA
105 mV
2
µA
V
0.25 V
1
nA
1.6 MHz
%
780 mA
200 mV
5
µA
%
Notes:
(1) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods
may affect device reliability. All voltages are with respect to ground.
© Catalyst Semiconductor, Inc.
3
Characteristics subject to change without notice
Doc. No. MD-5005 Rev. T