CAT37TDI-GT3 ON Semiconductor, CAT37TDI-GT3 Datasheet - Page 2

• Manufacturer Part Number: CAT37TDI-GT3
• Description: IC BOOST CONV DC/DC TSOT23-5
• Manufacturer: ON Semiconductor
• Type: Backlight, White LEDr

Specifications of CAT37TDI-GT3

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.6MHz
• Voltage - Supply: 2.5 V ~ 7 V
• 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: 80%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Typical Application Circuit
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
NOTE:
Table 1. PIN DESCRIPTION
Table 2. ABSOLUTE MAXIMUM RATINGS
Table 3. RECOMMENDED OPERATING CONDITIONS
V
SW voltage
Storage Temperature Range
Junction Temperature
Lead Soldering Temperature (10 secs)
ESD Rating – Human Body Model
V
Ambient Temperature Range
Inductor L1
Input Capacitor C1
Output Capacitor C2
I
LED
IN
IN
Pin Number
, FB, SHDN voltage
with 1 to 4 LEDs in series
Typical application circuit with external components is shown above.
1
2
3
4
5
SHDN
Name
GND
SW
VIN
FB
3 V to 5 V
VIN
Shutdown pin.
Figure 1. Driver for Four High−Brightness White LEDs
Switch pin. This is the drain of the internal power switch. For minimum EMI, minimize the trace area
connected to this pin.
Ground pin. Connect pin 2 to ground.
LED (cathode) connection pin.
Input supply pin. This pin should be bypassed with a capacitor to ground. A 1 mF capacitor mounted
close to the pin is recommended.
ON OFF
C1
1 mF
Parameter
Parameter
4
5
SHDN
VIN
http://onsemi.com
L1 6.8 mH
CAT37
GND
2
2
SW
FB
1
D1
3
Function
R
6.34 W
1
15 mA
C1: Taiyo Yuden JMK212BJ475
C2: Taiyo Yuden EMK212BJ105
L1: Panasonic ELJEA6R8 or equivalent
C2
1 mF
6.8 ± 20% typical
1.0 ± 20% typical
1.0 ± 20% typical
−65 to +160
−40 to +85
Rating
2.5 to 7
Range
0 to 20
2000
125
300
20
8
Unit
Unit
mA
mH
°C
°C
°C
°C
mF
mF
V
V
V
V