CAT4237TD-GT3 ON Semiconductor, CAT4237TD-GT3 Datasheet - Page 5

• Manufacturer Part Number: CAT4237TD-GT3
• Description: IC LED DRVR WHT BCKLGHT TSOT23-5
• Manufacturer: ON Semiconductor
• Type: Backlight, White LEDr

Specifications of CAT4237TD-GT3

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.3MHz
• Voltage - Supply: 2.8 V ~ 5.5 V
• Voltage - Output: 30V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 40mA
• Internal Switch(s): Yes
• Efficiency: 87%
• Number Of Digits: 8
• Low Level Output Current: 1 mA
• High Level Output Current: 40 mA
• Operating Supply Voltage: 2.8 V to 5.5 V
• Maximum Supply Current: 1.5 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CAT4237TD-GT3TR

1040
1020
1000
140
120
100
315
310
305
300
295
290
285
980
960
80
60
40
20
0
2.7
2.7
2.7
(V
Figure 6. FB Pin Voltage vs. Supply Voltage
Figure 8. Switching Frequency vs. Supply
IN
= 3.6 V, C
3.0
3.0
3.0
Figure 4. Quiescent Current vs. V
3.3
3.3
3.3
IN
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 4.7 mF, C
(Not Switching)
8 LEDs at 20 mA
VOUT = 26 V
3.6
3.6
3.6
Voltage
OUT
VFB = 0.4 V
(not switching)
3.9
3.9
3.9
= 0.22 mF, L = 33 mH with 8 LEDs at 20 mA, T
4.2
4.2
4.2
TYPICAL CHARACTERISTICS
IN
4.5
4.5
4.5
http://onsemi.com
4.8
4.8
4.8
AC coupled
100mA/div
200mV/div
5
Current
Inductor
20V/div
SW pin
VOUT
315
310
305
300
295
290
285
2.0
1.5
1.0
0.5
0
2.5
0
Figure 7. FB Pin Voltage vs. Output Current
Figure 5. Quiescent Current vs. V
AMB
5
3.0
Figure 9. Switching Waveforms
= 25°C, unless otherwise specified.)
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
10
3.5
(Switching)
0.5 msec/div
8 LEDs
15
4.0
20
4.5
25
IN
5.0
30