TPS62136RGXR

Product Folder Order Now Support & Community Tools & Software Technical Documents TPS62136, TPS621361 SLVSDV2 – MARCH 2017 TPS62136, TPS621361 1-MHz High Accuracy 3-V to 17-V 4-A Step-Down Converters with DCS ControlTM 1 Features 3 Description • • • • • • • The TPS62136 and TPS621361 are high efficiency and easy to use synchronous step-down DC-DC converters, based on the DCS-Control™ Topology. The devices wide input voltage range of 3-V to 17-V makes it suitable for multi-cell Li-Ion as well as 12-V intermediate supply rails. The devices provide 4-A continuous output current. The TPS62136 automatically enters Power Save Mode at light loads to maintain high efficiency across the whole load range. With that, the device is well suited for applications that require connected standby performance, like ultra low power computers. With the MODE pin set to low, the switching frequency of the device is adapted automatically based on the input and output voltage. This technique is called Automatic Efficiency Enhancement (AEE™) and maintains high conversion efficiency over the whole operation range. It provides a 1% output voltage accuracy in PWM mode and therefore enables the design of a power supply with high output voltage accuracy. 1 • • • • • • • • Output Voltage Accuracy ± 1% (PWM mode) Input Voltage Range: 3 V to 17 V Quiescent Current 18 µA Typ Output Voltage from 0.8 V to 12 V Adjustable Soft-Start Forced PWM or PWM/PFM operation Typical switching frequency of 1 MHz in forced PWM Precise ENABLE input allows – User-Defined Undervoltage Lockout – Exact Sequencing 100% Duty Cycle Mode Automatic Efficiency Enhancement AEE™ DCS-Control™ Topology Available with Active Output Discharge Optional HICCUP Overcurrent Protection Power Good Output Available in 3-mm x 2-mm VQFN Package 2 Applications • • • • • Standard 12-V Rail Supplies POL for Connected Standby Requirements POL Supply from Single or Multiple Li-Ion Battery Gaming Consoles, SSD Drives Mobile and Embedded Computers The device has a typical quiescent current of 18 µA. In shutdown mode the current is typically 1 µA and the output is actively discharged for TPS62136 while the output voltage discharge feature is disabled in TPS621361. The TPS62136 is available as an adjustable version, packaged in a 3-mm x 2-mm VQFN package. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) TPS62136 VQFN 3.00 mm x 2.00 mm TPS621361 VQFN 3.00 mm x 2.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. space Efficiency vs Output Current for Vo = 5 V Simplified Schematic TPS62136 VIN 10uF EN 1.5 uH 100 VOUT = 0.8V to 12V SW 90 VOS R1 80 47uF FB R2 VSEL PG MODE FB2 SS/TR GND Efficiency (%) VBAT = 3.0V to 17V 70 60 50 VIN = 6 V VIN = 8 V VIN = 10 V VIN = 12 V VIN = 15 V 40 30 Copyright © 2016, Texas Instruments Incorporated 20 10P 100P 1m 10m 100m Output Current (A) 1 4 D010 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. TPS62136, TPS621361 SLVSDV2 – MARCH 2017 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Device Comparison Table..................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 3 4 7.1 7.2 7.3 7.4 7.5 7.6 4 4 4 5 5 7 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information ................................................. Electrical Characteristics........................................... Typical Characteristics .............................................. 8 Parameter Measurement Information .................. 7 9 Detailed Description .............................................. 8 9.4 Device Functional Modes........................................ 10 10 Application and Implementation........................ 13 10.1 Application Information.......................................... 13 10.2 Typical Applications ............................................. 16 10.3 System Examples ................................................. 30 11 Power Supply Recommendations ..................... 34 12 Layout................................................................... 34 12.1 Layout Guidelines ................................................. 34 12.2 Layout Example .................................................... 34 12.3 Thermal Considerations ........................................ 35 13 Device and Documentation Support ................. 36 13.1 13.2 13.3 13.4 13.5 13.6 13.7 8.1 Schematic ................................................................. 7 9.1 Overview ................................................................... 8 9.2 Functional Block Diagram ......................................... 8 9.3 Feature Description................................................... 9 Device Support .................................................... Receiving Notification of Documentation Updates Related Links ........................................................ Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 36 36 36 36 36 36 36 14 Mechanical, Packaging, and Orderable Information ........................................................... 37 4 Revision History 2 DATE REVISION NOTES March 2017 * Initial release. Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Product Folder Links: TPS62136 TPS621361 TPS62136, TPS621361 www.ti.com SLVSDV2 – MARCH 2017 5 Device Comparison Table (1) DEVICE NUMBER FEATURES OUTPUT VOLTAGE MARKING TPS62136RGX nominal switching frequency = 1 MHz output voltage discharge voltage selection input / output VSEL/FB2 HICCUP current limit adjustable 62136 TPS621361RGX nominal switching frequency = 1 MHz voltage selection input / output VSEL/FB2 adjustable 621361 TPS62135RGX (1) nominal switching frequency = 2.5 MHz output voltage discharge voltage selection input / output VSEL/FB2 HICCUP current limit adjustable 62135 TPS621351RGX (1) voltage selection input / output VSEL/FB2 nominal switching frequency = 2.5 MHz adjustable 621351 Please see the TPS62135, TPS621351 data sheet for details 6 Pin Configuration and Functions RGX Package 11-Pin VQFN bottom view top view 8 7 EN PG SS/TR VOS 9 10 6 VIN SW 5 GND MODE 7 4 VSEL FB 2 1 2 EN VOS SS/TR 6 9 5 FB 11 8 PG GND SW VIN 10 FB MODE FB 2 VSEL 4 11 3 3 2 1 Pin Functions PIN NAME NUMBER I/O DESCRIPTION EN 8 I This is the enable pin of the device. Connect to logic low to disable the device. Pull high to enable the device. Do not leave this pin unconnected. FB 5 I Voltage feedback input, connect resistive output voltage divider to this pin. FB2 4 O Open drain of an internal switch to GND. Allows to turn on a resistor in parallel to the feedback resistor R2 and increase the output voltage with VSEL = high. GND 3 MODE 10 I The device runs in PFM/PWM mode when this pin is pulled low. When the pin is pulled high, the device runs in forced PWM mode. Do not leave this pin unconnected. PG 7 O Open drain power good output. SS/TR 9 I Soft-Start / Tracking pin. An external capacitor connected from this pin to GND defines the rise time for the internal reference voltage. The pin can also be used as an input for tracking and sequencing - see Detailed Description section in this document. SW 2 This is the switch pin of the converter and is connected to the internal Power MOSFETs. VIN 1 Power supply input. Make sure the input capacitor is connected as close as possible between pin VIN and GND. VOS 6 I Output voltage sense pin. Connect directly to the positive pin of the output capacitor. VSEL 11 I Voltage scaling control input. Turns on an internal switch from FB2 to GND when this pin is set high. Ground pin. Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Product Folder Links: TPS62136 TPS621361 3 TPS62136, TPS621361 SLVSDV2 – MARCH 2017 www.ti.com 7 Specifications 7.1 Absolute Maximum Ratings MIN MAX UNIT VIN -0.3 20 V SW, VOS -0.3 VIN+0.3 V -2 25.5 V -0.3 VIN+0.3 V Operating junction temperature, TJ -40 150 °C Storage temperature range, Tstg -65 150 °C Pin voltage range (2) SW (transient for t