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TPS5120-EP Dataheets PDF



Part Number TPS5120-EP
Manufacturers Texas Instruments
Logo Texas Instruments
Description Two-Phase Synchronous Buck DC/DC Controller
Datasheet TPS5120-EP DatasheetTPS5120-EP Datasheet (PDF)

TPS5120ĆEP DUAL OUTPUT, TWOĆPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER D Controlled Baseline − One Assembly/Test Site, One Fabrication Site D Extended Temperature Performance of −55°C to 125°C D Enhanced Diminishing Manufacturing Sources (DMS) Support D Enhanced Product-Change Notification D Qualification Pedigree† D Independent Dual-Outputs Operate 180° Out of Phase D Wide Input Voltage Range: 4.5-V − 28-V D Adjustable Output Voltage Down to 0.9 V D Pin-Selectable PWM/SKIP Mode for High Efficienc.

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TPS5120ĆEP DUAL OUTPUT, TWOĆPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER D Controlled Baseline − One Assembly/Test Site, One Fabrication Site D Extended Temperature Performance of −55°C to 125°C D Enhanced Diminishing Manufacturing Sources (DMS) Support D Enhanced Product-Change Notification D Qualification Pedigree† D Independent Dual-Outputs Operate 180° Out of Phase D Wide Input Voltage Range: 4.5-V − 28-V D Adjustable Output Voltage Down to 0.9 V D Pin-Selectable PWM/SKIP Mode for High Efficiency Under Light Loads D Synchronous Buck Operation Allows up to 95% Efficiency D Separate Standby Control and Overcurrent Protection for Each Channel D Programmable Short-Circuit Protection † Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. SGLS224A − JANUARY 2004 − REVISED APRIL 2006 D Low Supply (1 mA) and Shutdown (1 nA) Current D Power Good Output D High-Speed Error Amplifiers D Sequencing Easily Achieved by Selecting Softstart Capacitor Values. D 5-V Linear Regulator Power Internal IC Circuitry D 30-Pin TSSOP Packaging DBT PACKAGE (TOP VIEW) INV1 1 FB1 2 SOFTSTART1 3 PWM/SKIP 4 CT 5 5V_STBY 6 GND 7 REF 8 STBY1 9 STBY2 10 FLT 11 POWERGOOD 12 SOFTSTART2 13 FB2 14 INV2 15 30 LH1 29 OUT1_u 28 LL1 27 OUT1_d 26 OUTGND1 25 TRIP1 24 VCC 23 TRIP2 22 VREF5 21 REG5V_IN 20 OUTGND2 19 OUT2_d 18 LL2 17 OUT2_u 16 LH2 description The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 Copyright  2006 Texas Instruments Incorporated 1 TPS5120ĆEP DUAL OUTPUT, TWOĆPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER SGLS224A − JANUARY 2004 − REVISED APRIL 2006 ORDERING INFORMATION PACKAGE TA TSSOP (DBT) EVM −40°C to 125°C TPS5120QDBTREP TPS5120EVM-151 −55°C to 125°C TPS5120MDBTREP TPS5120EVM-151 typical design VI C1 GND R1 C4 C5 C6 C7 C8 R2 Q1 R3 U1 R7 TPS5120DBT C3 1 INV1 30 LH1 D1 2 FB1 3 SOFTSTART1 29 OUT1_u 28 LL1 C11 Q2 4 PWM/SKIP 5 CT 6 5V_STBY 7 GND 8 REF 27 OUT1_d OUTGND1 26 25 TRIP1 24 Vcc 23 TRIP2 C15 R8 R9 9 STBY1 10 STBY2 22 VREF5 21 REG5V_IN C16 11 FLT 20 OUTGND2 12 POWERGOOD OUT2_d 19 13 SOFTSTART2 14 FB2 15 R4 INV2 18 LL2 17 C12 OUT2_u LH2 16 D2 Q3 R10 C10 C15 Q4 L1 C13 C14 L2 R5 R6 Figure 1. EVM Typical Design VO1 VO2 2 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 TPS5120ĆEP DUAL OUTPUT, TWOĆPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER functional block diagram SGLS224A − JANUARY 2004 − REVISED APRIL 2006 SOFTSTART1 FB1 INV1 CT FLT FB2 INV2 PWM/SKIP SOFTSTART1 Skip Comp. _ PWM Comp. _ + DLY + DLY 0.85 V _ + + Err Amp. _ OVP1 + 0.85 V+12% _ OVP2 + 0.85 V+12% + UVP1 _ 0.85 V −19.4% + UVP2 _ 0.85 V −19.4% OSC UVLO SIGNAL STBY1 STBY2 Timer Current Protection Trigger Phase Inverter _ Err Amp. + + _ + Skip Comp. PWM Comp. _ + _ + LS.


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