Document
1A / 1.5MHz Synchronous Buck Converter
SOT-25
Pin Definition: 1. EN 2. Ground 3. Switching Output 4. Input 5. Feedback
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TS3410
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 350uA and drops to <1uA in shutdown. The 2.5V to 6.5V 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 1.5MHz, 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 6.5V Input Voltage Range Short Circuit Protection (SCP) 1.5MHz Constant Frequency Operation Low Dropout Operation: 100% Duty Cycle 0.6V Reference Allows Low Output Voltages 1A Output Current at VIN=3V & VOUT=1.8V Low Quiescent Current: 350uA No Schottky Diode Required in Application ≤1uA Shutdown Current Current Mode Operation for Excellent Line and Load Transient Response
Application
● ● ● ● Cellular Phones Digital Still Cameras Portable Electronics USB Devices
Pin Description
Name
EN GND SW
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
Ordering Information
Part No.
TS3410CX5 RF
Package
SOT-25
Packing
3Kpcs/ 7” Reel
VCC FB
Application Circuit
1/7
Version: A08
1A / 1.5MHz Synchronous Buck Converter
Absolute Maximum Rating
Characteristics
VIN Pin Voltage Feedback Pin Voltage RUN Pin Voltage Switch Pin Voltage Peak SW Sink & Source Current Operating Supply Voltage Power Dissipation Storage Temperature Range Operating Temperature Range Junction Temperature Thermal Resistance from Junction to case Thermal Resistance from Junction to ambient
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TS3410
Symbol
VIN VFB VRUN VSW IPSW VOP PD TST TOP TJ θJC θJA
2
Rating
Gnd - 0.3 to Gnd + 7 Gnd - 0.3 to VIN + 0.3 Gnd - 0.3 to VIN + 0.3 Gnd - 0.3 to VIN + 0.3 1.4 +2.5 to +6 (TJ-TA) / θJA -40 to +150 -40 to +85 +125 110 250
Unit
V V V V A V mW
o o o o o
C C C
C/W C/W
Note1: θJA is measured with the PCB copper area of approximately 1 in (Multi-layer). that need connect to Gnd pin of the TS3410.
Electrical Specifications (Ta = 25oC, VIN=VRUN=3.6V unless otherwise noted)
Characteristics
Feedback Voltage Quiescent Current Feedback Bias Current Shutdown Supply Current Maximum Output Current Cu.