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TPS5103

Texas Instruments
Part Number TPS5103
Manufacturer Texas Instruments
Description Multiple Mode Synchronous DC/DC Controller
Published Jun 6, 2022
Detailed Description TPS5103 MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER D Step-Down DC-DC Converter D Three Operation-Modes – Heavy Load: – ...
Datasheet PDF File TPS5103 PDF File

TPS5103
TPS5103

Overview
TPS5103 MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER D Step-Down DC-DC Converter D Three Operation-Modes – Heavy Load: – Fixed Frequency PWM – Hysteretic (User Selectable) – Light Load: – Skip Mode D 4.
5-V to 25-V Input Voltage Range D Adjustable Output Voltage Down to 1.
2 V D 95% Efficiency D Standby Control D Overcurrent Protection D UVLO for Internal 5-V Regulation D Low-Standby Current .
.
.
0.
5 mA Typical D TA = –40°C to 85°C SLVS240A – SEPTEMBER 1999 – REVISED MAY 2001 DB PACKAGE (TOP VIEW) SOFTSTART 1 INV 2 FB 3 CT 4 RT 5 GND 6 REF 7 COMP 8 PWM/SKIP 9 STBY 10 20 LH 19 OUT_u 18 LL 17 OUT_d 16 OUTGND 15 TRIP 14 VCC_SENSE 13 VCC 12 VREF5 11 VREG5V_IN description The TPS5103 is a synchronous buck dc/dc controller, designed for notebook PC system power.
The controller has three user-selectable operation modes available: hysteretic mode, fixed-frequency PWM control, or SKIP control.
In high-current applications, where fast transient response is advantageous for reducing bulk capacitance, the hysteretic mode is selected by connecting the RT pin to VREF5.
Selecting the PWM/SKIP modes for less demanding transient applications is ideal for conserving notebook battery life under light load conditions.
The device includes high-side and low-side MOSFET drivers capable of driving low rds(on) N-channel MOSFETs.
The user-selectable overcurrent protection (OCP) threshold is set by an external TRIP-pin resistor in order to protect the system.
The TPS5103 is configured so that a current-sense resistor is not required, improving the operating efficiency.
C4 5V C1 R2 C2 R1 U1 TPS5103 1 20 SOFTSTART LH 2 INV 3 19 OUT_u 18 FB 4 5 6 CT RT LL 17 OUT_d 16 OUTGND 15 GND TRIP 7 REF 8 14 VCC_SENSE 13 COMP 9 PWM/SKIP VCC 12 VREF5 10 STBY 11 VREG5V_IN D1 C3 R3 R4 Q1 OUTPUT L1 C5 + Q2 Figure 1.
Typical Design Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semicondu...


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