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TP3406 Dataheets PDF



Part Number TP3406
Manufacturers Top Power
Logo Top Power
Description High Efficiency PWM Step-Down DC/DC Converter
Datasheet TP3406 DatasheetTP3406 Datasheet (PDF)

TP3406 1.5MHz, 600mA, High Efficiency PWM Step-Down DC/DC Converter General Description The TP3406 is a high-efficiency pulse-width-modulated(PWM) step-down DC-DC converter. Capable of delivering600mA output current over a wide input voltage range from2.5V to 5.5V, the TP3406 is ideally suited for port -ableelectronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range suchas cellular phones, PDAs and handy-terminals. Internal synchronous rectifie.

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TP3406 1.5MHz, 600mA, High Efficiency PWM Step-Down DC/DC Converter General Description The TP3406 is a high-efficiency pulse-width-modulated(PWM) step-down DC-DC converter. Capable of delivering600mA output current over a wide input voltage range from2.5V to 5.5V, the TP3406 is ideally suited for port -ableelectronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range suchas cellular phones, PDAs and handy-terminals. Internal synchronous rectifier with low RDS(ON) dramatically reduces cond -uction loss at PWM mode. No external Schottky diode is required in prac -tical application. The TP3406 automatically turns off the synchronous rec -tifier while the inductor current is low and enters discontinuous PWM mode. This can increase efficiency at light load condition. The TP3406 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. TP3406 enter shutdown mode and consumes less than 0.1mA when EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elem -ents due to a fixed operation frequency of 1.5MHz. This along with small SOT-23-5 and TSOT-23-5 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection,and over current protection Pin Configurations Features +2.5V to +5.5V Input Range Adjustable Output From 0.6V to VIN 1.0V, 1.2V, 1.5V, 1.8V, 2.5V and 3.3V Fixed/ Adjustable Output Voltage 600mA Output Current, 1A Peak Current 95% Efficiency Page 1 of 11C:\Documents and Settings\Administrator\\tp3406 ~datasheet.doc No Schottky Diode Required 1.5MHz Fixed-Frequency PWM Operation Small SOT-23-5 and TSOT-23-5 Package RoHS Compliant and 100% Lead (Pb)-Free Applications Cellular Telephones Personal Information Appliances Wireless and DSL Modems MP3 Players Portable Instruments Typical Application Circuit TP3406 Figure 1. Fixed Voltage Regulator Figure 2. Adjustable Voltage Regulator with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA, and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection. Page 2 of 11C:\Documents and Settings\Administrator\\tp3406 ~datasheet.doc Functional Pin Description TP3406 Pin Number Pin Name 1 EN 2 GND 3 LX 4 VIN 5 FB/VOUT Pin Function Chip Enable (Active High, do not leave EN pin floating, and VEN < VIN + 0.6V> Ground. Pin for Switching. Power Input. Feedback Input Pin. Function Block Diagram Absolute Maximum Ratings (Note 1) Supply Input Voltage ----------------------------------------------------------------------- 6.5V Enable, FB Voltage-------------------------------------------------------------------------- VIN + 0.6V Power Dissipation, PD @ TA = 25°C SOT-23-5, TSOT-23-5 ------------------------------------------------------------------------ 0.4W Package Thermal Resistance (Note 4) SOT-23-5, TSOT-23-5, θJA ------------------------------------------------------------------- 250°C/W SOT-23-5, TSOT-23-5, θJC ------------------------------------------------------------------- 130°C/W Junction Temperature Range ------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) ------------------------------------------------ 260°C Storage Temperature Range -------------------------------------------------------------- −65°C to 150°C ESD Susceptibility (Note 2) HBM (Human Body Mode) -------------------------------------------------------------------- 2kV MM (Machine Mode) ---------------------------------------------------------------------------- 200V Recommended Operating Conditions (Note 3) Page 3 of 11C:\Documents and Settings\Administrator\\tp3406 ~datasheet.doc TP3406 Supply Input Voltage ------------------------------------------------------------------------- 2.5V to 5.5V Junction Temperature Range -------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range -------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VIN = 3.6V, VOUT = 2.5V, VREF = 0.6V, L = 2.2μH, CIN = 4.7μF, COUT = 10μF, TA = 25°C, IMAX = 600mA unless otherwise specified) Parameter Symbo Test Conditions Min Typ Max Units l Input Voltage Range VIN 2.5 5.5 V Quiescent Current IQ IOUT = 0mA, VFB = VREF + 5% 50 100 μA Shutdown Current ISHDN EN = GND 0.1 1 μA Reference Voltage VREF For adjustable output voltage 0.588 0.6 0.612 V Adjustable Output Range VOUT VREF VIN−0.2 V Output Voltage Accuracy Fix ΔVOUT Adjustable ΔVOUT VIN = 2.2 to 5.5V, VOUT = 1.0V 0A < IOUT < 600mA VIN = 2.2 to 5.5V, VOUT = 1.2V 0A < IOUT < 600mA VIN = 2.2 to 5.5V, VOUT = 1.5V 0A < IOUT .


FT24C512A TP3406 BCT3661B


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