TS3410_10 Datasheet, PDF (1/10 Pages) Taiwan Semiconductor Company, Ltd – 1A / 1.4MHz Synchronous Buck Converter

TS3410
1A / 1.4MHz Synchronous Buck Converter
SOT-25
Pin Definition:
1. EN
2. Ground
3. Switching Output
4. Input
5. Feedback
General Description
TS3410 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode
architecture. The device is available in an adjustable version. Supply current with no load is 250uA and drops to
<1uA in shutdown. The 2.5V to 6V input voltage range makes TS3410 ideally suited for single Li-Ion, two to four
AA battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in
portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive
applications. Switching frequency is internally set at 1.4MHz, allowing the use of small surface mount inductors
and capacitors. The internal synchronous switch increases efficiency and decreases need of an external Schottky
diode. Low output voltages are easily supported with the 0.6V feedback reference voltage.
Features
● High Efficiency: Up to 96%
● 2.5V to 6V Input Voltage Range
● Output Voltage from 0.6V to VIN
● Short Circuit Protection (SCP)
● Build in Soft-Start Function
● 1.4MHz Constant Frequency Operation
● Up to 1A Output Current
● Low Quiescent Current: 250uA (Typ.)
● No Schottky Diode Required in Application
● ≤1uA Shutdown Current
● Current Mode Operation for Excellent Line and
Load Transient Response
Ordering Information
Part No.
TS3410CX5 RF
Package
SOT-25
Packing
3Kpcs/ 7” Reel
Application
● Cellular Phones
● Digital Still Cameras
● Portable Electronics
● USB Devices
Pin Description
Name
EN
GND
SW
VCC
FB
Description
Power-off pin
H：normal operation
L：Step-down operation stopped
(All circuits deactivated)
Ground pin
Switch output pin. Connect external inductor
here. Minimize trace area at this pin to
reduce EMI.
IC power supply pin
Output Feedback pin
Application Circuit
VIN=2.5V~6V
C1
4.7u
U1
VIN
SW
EN
GND ^FB
AX3513
L1
2.7uH
R1
600K
V_OUT = 0.6 * (1+R1/R2)
R2=100K~330K
R2
300K
VOUT=1.8V
C3
15p _C2
10u
1/10
Version: C08