Details, datasheet, quote on part number: TPS62112
PartTPS62112
CategorySemiconductors => Power Management => Non-isolated DC/DC Switching Regulator => Step-Down (Buck) => Buck Converter (Integrated Switch)
Part familyTPS62112 5-V, 1.5-A, 17-V Vin Step-Down Converter in QFN-16
Description5-V, 1.5-A, 17-V Vin Step-Down Converter in QFN-16 16-QFN -40 to 85
CompanyTexas Instruments, Inc.
StatusACTIVE
ROHSY
SampleNo
DatasheetDownload TPS62112 datasheet
Cross ref.Similar parts: MAX16961RATEA+, MAX16961RATEA/V+, MAX16961RATEB/V+, MAX16961SATEA+, MAX16961SATEA/V+, MAX16961SATEB/V+, MAX16961SATEC+, MAX16961SATEC/V+, MAX16962RATEA/V+, MAX16962SATEA/V+
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Specifications 
Iq(Typ)(mA)0.02
Duty Cycle(Max)(%)100
Operating Temperature Range(C)-40 to 85
RatingCatalog
Iout(Max)(A)1.5
Vout(Min)(V)5
Vin(Max)(V)17
TypeConverter
Regulated Outputs(#)1
Vin(Min)(V)3.1
Package GroupQFN
Control ModeVoltage Mode
Approx. Price (US$)1.05 | 1ku
Switching Frequency(Min)(kHz)900
Vout(Max)(V)5
FeaturesEnable,Frequency Synchronization,Light Load Efficiency,Power Good,Synchronous Rectification
Switching Frequency(Max)(kHz)1100
  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
16RSAVQFNS-PQFP-N3000LARGE T&R62112 44.9.65
Application notes
• Adding Hysteresis to Low-Battery Input on the TPS6211x
The low-battery input (LBI), available on several step-down converters, is often used to shut down the converter when the input voltage falls below a set threshold. This prevents damage to the battery and signals that the battery is at the end of its life | Doc
• QFN/SON PCB Attachment Application Report (Rev. A) | Doc
• Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. A) | Doc
• Five steps to a great PCB layout for a step-down converter | Doc
• IQ: What it is, what it isn’t, and how to use it | Doc
• Performing Accurate PFM Mode Efficiency Measurements
When performing measurements on DC-DC converters using pulse frequency modulation (PFM), proper care must be taken to ensure that the measurements are accurate. Due to the nature of a converter operating in PFM mode, the test setup required to obtain corre | Doc
• Basic Calculation of a Buck Converter's Power Stage (Rev. B) | Doc
• TPS6211X Driving EN and SYNC pin
The TPS6211x high-input-voltage buck converters operate over a wide, input-voltage range. The control and input signal can also be controlled from 1.8-V logic levels up to maximum input voltage.One characteristic of the EN and SYNC control circuits is the | Doc
• Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) | Doc
• Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | Doc
• Optimizing Resistor Dividers at a Comparator (Rev. A) | Doc
• Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs | Doc
• Testing tips for applying external power to supply outputs without an input volt | Doc
Evaluation Kits
TPS62110EVM-101: TPS62110 Evaluation Module
Spice Model
TPS62112 PSpice Transient Model - ZIP (07/14/2011)

 

Features, Applications

FEATURES

High-Efficiency Synchronous Step-Down Converter With to 95% Efficiency to 17-V Operating Input Voltage Range Adjustable Output Voltage Range From 16 V Fixed Output Voltage Options Available 3.3 V and 5 V Synchronizable to External Clock Signal to 1.4 MHz to 1.5-A Output Current High Efficiency Over a Wide Load Current Range Due to PFM/PWM Operation Mode 100% Maximum Duty Cycle for Lowest Dropout 20-A Quiescent Current (Typical) Overtemperature and Overcurrent Protected Available in 16-Pin QFN Package

DESCRIPTION

The TPS6211x devices are a family of low-noise synchronous step-down dc-dc converters that are ideally suited for systems powered from a 2-cell Li-ion battery or from or 15-V rail. The is a synchronous PWM converter with integrated and P-channel power MOSFET switches. Synchronous rectification is used to increase efficiency and to reduce external component count. To achieve highest efficiency over a wide load current range, the converter enters a power-saving, pulse-frequency modulation (PFM) mode at light load currents. Operating frequency is typically 1 MHz, allowing the use of small inductor and capacitor values. The device can be synchronized to an external clock signal in the range of 0.8 MHz to 1.4 MHz. For low noise operation, the converter can be operated in PWM-only mode. In the shutdown mode, the current consumption is reduced to less than 2 A. The TPS6211x is available in the 16-pin (RSA) QFN package, and operates over a free-air temperature range to 85C.

APPLICATIONS
Point-of-Load Regulation From 12-V Bus Organizers, PDAs, and Handheld PCs Handheld Scanners

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. PowerPAD is a trademark of Texas Instruments.

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.

This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges; HBM according EIA/JESD22-A114-B, MM according EIA/JESD22-A115-A, and CDM according EIA/JESD22C101C; however, it is advised that precautions be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriate logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies available from Texas Instruments. ORDERING INFORMATION

PLASTIC QFN 16 (RSA) TPS62112 (1) PIN (1) OUTPUT VOLTAGE Adjustable V 5V LBI/LBO FUNCTIONALITY Standard MARKING TPS62111 TPS62112

The RSA package is available in tape and reel. Add R suffix (TPS62110RSAR) to order quantities of 3000 parts per reel. Add T suffix (TPS62110RSAT) to order quantities of 250 parts per reel.

over operating free-air temperature range (unless otherwise noted)

UNIT VCC TJ TA Tstg Supply voltage at VIN, VINA Voltage at SW Voltage at EN, SYNC, LBO, PG Voltage at LBI, FB Output current at SW Maximum junction temperature Operating free-air temperature Storage temperature Lead temperature mm (1/16-inch) from case for 10 seconds 150C 300C

Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

PACKAGE RSA TA 25C POWER RATING 2.5 W DERATING FACTOR ABOVE 25C 25 mW/C = 70C POWER RATING = 85C POWER RATING 1W

Based on a thermal resistance of 40 K/W soldered onto a high K board.

MIN VCC TJ Supply voltage at VIN , VINA Maximum voltage at power-good, LBO, EN, SYNC Operating junction temperature 40 3.1 NOM MAX 17 125 UNIT V C

PARAMETER SUPPLY CURRENT VI I(Q) Input voltage range Operating quiescent current = 0 mA, SYNC = GND, = 0 mA, SYNC = GND, 17 V I(SD) ENABLE VIH VIL IIKG I(EN) V(UVLO) EN high-level input voltage EN low-level input voltage EN trip-point hysteresis EN input leakage current EN input current Undervoltage lockout threshold Undervoltage lockout hysteresis POWER SWITCH 350 mA rDS(ON) P-channel MOSFET on-resistance P-channel MOSFET leakage current P-channel MOSFET current limit rDS(ON) N-channel MOSFET on-resistance N-channel MOSFET leakage current POWER GOOD OUTPUT , LBI, LBO V(PG) Power good trip voltage VO ramping positive VO ramping negative V(FB) VO nominal, IOL mA 1 V(FB) = VO nominal, V(LBI) 0.01 3 Input voltage falling CMOS-logic clock signal on SYNC pin mV kHz 100 mA VDS 100 mA VDS EN = GND or VI, 0.6 V V(EN) 4 V Input voltage falling V mV Shutdown current EN = GND EN = GND, 7.2 V

Power good delay time VOL IOL PG, LBO output low voltage PG, LBO sink current PG, LBO output leakage current Minimum supply voltage for valid power good, LBI, LBO signal VLBI ILBI Low battery input trip voltage LBI input leakage current Low battery input trip-point accuracy VLBI,HYS Low battery input hysteresis OSCILLATOR fS f(SYNC) VIH VIL (1) Oscillator frequency Synchronization range SYNC high-level input voltage SYNC low-level input voltage Device is not switching.


 

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