Datasheet

CAT3637
http://onsemi.com
3
Table 3. ELECTRICAL OPERATING CHARACTERISTICS
(over recommended operating conditions unless specified otherwise) V
IN
= 3.6 V, EN = High, T
AMB
= 25°C
Symbol
Name Conditions Min Typ Max Units
I
Q
Quiescent Current 1x mode, V
IN
= 4.2 V
1.33x mode, V
IN
= 3.3 V
1.5x mode, V
IN
= 2.8 V
2x mode, V
IN
= 2.5 V
1.5
2.8
3.7
3.8
mA
I
QSHDN
Shutdown Current V
EN
= 0 V 1
mA
I
LED−ACC
LED Current Accuracy 2 mA ≤ I
LED
≤ 30 mA ±3 %
I
LED−DEV
LED Channel Matching
I
LED
* I
LEDAVG
I
LEDAVG
±1 %
R
OUT
Output Resistance (open loop) 1x mode, I
OUT
= 120 mA
1.33x mode, I
OUT
= 120 mA
1.5x mode, I
OUT
= 120 mA
2x mode, I
OUT
= 120 mA
0.5
3.5
3.5
6
W
F
OSC
Charge Pump Frequency 1.33x and 2x mode
1.5x mode
0.6
0.8
0.8
1.1
1.1
1.4
MHz
I
SC_MAX
Output short circuit Current Limit V
OUT
< 0.5 V 80 mA
LED
TH
1x to 1.33x or 1.33x to 1.5x or
1.5x to 2x Transition Thresholds at any LEDx pin
150 mV
V
HYS
1.33x to 1x Transition Hysteresis V
IN
− Highest LED V
F
400 mV
T
DF
Mode Transition Filter Delay 120
ms
I
IN_MAX
Input Current Limit V
OUT
> 1 V 450 mA
R
EN/DIM
V
HI
V
LO
EN/DIM Pin
− Internal Pull−down Resistor
− Logic High Level
− Logic Low Level
1.3
100
0.4
kW
V
V
T
SD
Thermal Shutdown 150 °C
T
HYS
Thermal Hysteresis 20 °C
V
UVLO
Undervoltage lockout (UVLO) threshold 2 V
NOTE: Typical application circuit with external components is shown on page 2.