Adjustable Power Module

PTH08T250W www.ti.com SLTS278B – JUNE 2007 – REVISED AUGUST 2007 50-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans™ 1FEATURES 2• • • • • • • • • • • • • Up to 50-A Output Current 4.5-V to 14-V Input Voltage Wide-Output Voltage Adjust (0.7 V to 3.6 V) ±1.5% Total Output Voltage Variation Efficiencies up to 96% Output Overcurrent Protection (Nonlatching, Auto-Reset) Operating Temperature: –40°C to 85°C Safety Agency Approvals: (Pending) – UL/IEC/CSA-C22.2 60950-1 Prebias Startup On/Off Inhibit Differential Output Voltage Remote Sense Adjustable Undervoltage Lockout Auto-Track™ Sequencing • • • • • • • • Multi-Phase, Switch-Mode Topology TurboTrans™ Technology Designed to meet Ultra-Fast Transient Requirements up to 300 A/μs SmartSync Technology Parallel Operation APPLICATIONS Complex Multi-Voltage Systems Servers Workstations DESCRIPTION The PTH08T250W is a high-performance 50-A rated, non-isolated power module. This module represents the 2nd generation of the popular PTH series power modules with a reduced footprint and improved features. Operating from an input voltage range of 4.5 V to 14 V, the PTH08T250W requires a single resistor to set the output voltage to any value over the range, 0.7 V to 3.6 V. The wide input voltage range makes the PTH08T250W particularly suitable for advanced computing and server applications that utilize a loosely regulated 8-V to 12-V intermediate distribution bus. Additionally, the wide input voltage range increases design flexibility by supporting operation with tightly regulated 5-V, 8-V, or 12-V intermediate bus architectures. The module incorporates a comprehensive list of features. Output overcurrent and over-temperature shutdown protects against most load faults. A differential remote sense ensures tight load regulation. An adjustable under-voltage lockout allows the turn-on voltage threshold to be customized. Auto-Track™ sequencing is a popular feature that greatly simplifies the simultaneous power-up and power-down of multiple modules in a power system. Additionally, the capability to current share between multiple PTH08T250W modules allows for load currents greater than 50A on a single rail. The PTH08T250W includes new patent pending technologies, TurboTrans™ and SmartSync. The TurboTrans feature optimizes the transient response of the regulator while simultaneously reducing the quantity of external output capacitors required to meet a target voltage deviation specification. Additionally, for a target output capacitor bank, TurboTrans can be used to significantly improve the regulators transient response by reducing the peak voltage deviation. SmartSync allows for switching frequency synchronization of multiple modules, thus simplifying EMI noise suppression tasks and reducing input capacitor RMS current requirements. The module uses double-sided surface mount construction to provide a low profile and compact footprint. Package options include both through-hole and surface mount configurations that are lead (Pb) - free and RoHS compatible. 1 2 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. TurboTrans, Auto-Track, TMS320 are trademarks of Texas Instruments. Copyright © 2007, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. www.D PTH08T250W SLTS278B – JUNE 2007 – REVISED AUGUST 2007 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. STANDARD APPLICATION Auto-Track RTT 1% 0.05 W (Optional) +Sense VO VO 10 VO 11 +C O 660 mF (Required) L O A D 20 VI 6 7 VI VI Track 2 3 5 19 TT +Sense 17 Share Comp CLKIO 14 VI 15 VI Inhibit 21 Inhibit/UVLO 22 SmartSync + CI 1000 mF (Required) GND Config 1 8 GND 9 12 13 AGND 4 PTH08T250W -Sense 16 VOAdj 18 RSET 1%, 0.05 W (Required) -Sense GND UDG-07002 A. When operating at an input voltage greater than 8V the minimum required input capacitance may be reduced to 560μF. 2 Submit Documentation Feedback Product Folder Link(s): PTH08T250W Copyright © 2007, Texas Instruments Incorporated www.D PTH08T250W www.ti.com SLTS278B – JUNE 2007 – REVISED AUGUST 2007 ORDERING INFORMATION For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see the TI website at www.ti.com. DATASHEET TABLE OF CONTENTS DATASHEET SECTION ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS TABLE (PTH08T250W) TERMINAL FUNCTIONS TYPICAL CHARACTERISTICS (VI = 12V) TYPICAL CHARACTERISTICS (VI = 5V) ADJUSTING THE OUTPUT VOLTAGE INPUT & OUTPUT CAPACITOR RECOMMENDATIONS TURBOTRANS™ INFORMATION SOFT-START POWER-UP REMOTE SENSE OUTPUT INHIBIT OVERCURRENT PROTECTION OVER-TEMPERATURE PROTECTION SYCHRONIZATION (SMARTSYNC) AUTO-TRACK SEQUENCING UNDERVOLTAGE LOCKOUT (UVLO) CURRENT SHARING CURRENT SHARING LAYOUT PREBIAS START-UP TAPE & REEL AND TRAY DRAWINGS PAGE NUMBER 3 4 6 7 8 9 11 15 19 19 20 20 20 21 23 26 27 30 30 32 ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) UNIT Vtrack TA Twave Treflow Tstg Track pin voltage Operating temperature range Over VI range Wave soldering temperature Solder reflow temperature Storage temperature Mechanical shock Mechanical vibration Weight Flammability (1) (2) Meets UL94V-O Per Mil-STD-883D, Method 2002.3 1 msec, 1/2 sine, mounted Mil-STD-883D, Method 2007.2 20-2000 Hz AH and AD suffix AS and AZ suffix Surface temperature of module body or pins for 5 seconds maximum. Surface temperature of module body or pins AH suffix AD suffix AS suffix AZ suffix –0.3 to VI + 0.3 –40 to 85 260 235 (1) 260 (1) –55 to 125 (2) 500 125 20 16.7 grams G °C V During reflow of surface mount package version do not elevate peak temperature of the module, pins or internal components above the stated maximum. The shipping tray or tape and reel cannot be used to bake parts at temperatures higher than 65C. Copyright © 2007, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): PTH08T250W 3 www.D PTH08T250W SLTS278B – JUNE 2007 – REVISED AUGUST 2007 www.ti.com ELECTRICAL CHARACTERISTICS PTH08T250W TA = 25°C, VI = 12 V, VO = 3.3 V, CI = 1000 µF, CO = 660 µF, and IO = IO max (unless otherwise stated) PARAMETER TEST CONDITIONS PTH08T250W MIN IO VI VOADJ Output current Over VO range Over IO range Over IO range –40°C < TA < 85°C Over VI range Over IO range Includes set-point, line, load, –40°C ≤ TA ≤ 85°C RSET = 1.62 kΩ, VO = 3.3 V RSET = 5.23 kΩ, VO = 2.5 V RSET = 12.7 kΩ, VO = 1.8 V η Efficiency IO = 30 A RSET = 19.6 kΩ, VO = 1.5 V RSET = 35.7 kΩ, VO = 1.2 V RSET = 63.4 kΩ, VO = 1.0 V RSET = open, VO = 0.7 V VO Ripple (peak-to-peak) ILIM ttr ΔVtr ttrTT ΔVtrTT IIL dVtrack/dt UVLOADJ Track input current (pin 20) Track slew rate capability Pin to GND CO ≤ CO (max) 4.3 4.0 4.2 1.0 Open (4) -0.2 -125 35 600 240 (5) (5) (5) UNIT MAX 48 50 14 (1) TYP 25°C, natural convection 60°C, 200 LFM 0.7 ≤ VO < 1.2 1.2 ≤ VO ≤ 3.6 0 0 4.5 4.5 0.7 ±0.5 ±0.3 ±5 ±5 ±1.5 94% 93% 91% 90% 88% 86% 83% 10 (1) A Input voltage range Output voltage adjust range Set-point voltage tolerance Temperature variation 14 3.6 ±1 (2) V V %Vo %Vo mV mV VO Line regulaltion Load regulation Total output variation (2) %Vo 20-MHz bandwidth Reset, followed by auto-recovery w/o TurboTrans CO= 660 μF, TypeC w/ TurboTrans CO= 3300 μF, TypeC RTT = short Recovery time VO over/undershoot Recovery time VO over/undershoot mVPP A µs mV µs mV –130 (3) Overcurrent threshold 100 100 160 100 45 Transient response 2.5 A/µs load step 50 to 100% IOmax µA V/ms 1 4.45 VI increasing, RUVLO = OPEN Adjustable Under-voltage lockout VI decreasing, RUVLO = OPEN (pin 21) Hysteresis, RUVLO ≤ 127 kΩ Input high voltage (VIH) Inhibit control (pin 21) Input low voltage (VIL) Input low current (IIL ), Pin 21 to GND Inhibit (pin 21) to GND, Track (pin 20) open Over VI and IO ranges, SmartSync (pin 22) to GND Synchronization frequency applied to pin 22 Synchronization (SYNC) control (pin 22) SYNC High-Level Input Voltage SYNC Low-Level Input Voltage SYNC Minimum Pulse Width V 0.6 V µA mA kHz Iin fs fSYNC VSYNCH VSYNCL tSYNC Input standby current Switching frequency 400 kHz V V nSec 3.9 5.5 0.8 200 (1) (2) (3) (4) (5) 4 For output voltages less than 1.2 V, the output ripple may increase (up to 2×) when operating at input voltages greater than (VO × 12). Adjusting the switching frequency using the SmartSync feature may increase or decrease this ratio. Please review the SmartSync section of the Application Information for further guidance. The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a tolerance of 1% with 100 ppm/C or better temperature stability. A low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 20. The open-circuit voltage is less than 8 Vdc. Do not place an external pull-up on this pin. If it is left open-circuit, the module operates when input power is applied. A small, low-leakage (<100 nA) MOSFET is recommended for control. For additional information, see the related application section. The PTH08T250W is a two-phase power module. Each phase switches at 300kHz typical, 180° out of phase from one another. The over-all switching frequency is 600 kHz ty