TLV62090 3A High Efficiency Synchronous Step-Down Converter with DCS-Control™

1 Features

2.5 V to 5.5 V Input Voltage Range
DCS-Control™
Up To 98% Efficiency
Power Save Mode
20 µA Operating Quiescent Current
100% Duty Cycle for Lowest Dropout
1.4 MHz Typical Switching Frequency
0.8 V to V_IN Adjustable Output Voltage
Output Discharge Function
Adjustable Softstart
Hiccup Short Circuit Protection
Output Voltage Tracking
Pin-to-Pin Compatible with TPS62090, TLV62095 and TPS62095
For Improved Feature Set, See TPS62090
Create a Custom Design using the TLV62090 with the WEBENCH® Power Designer

2 Applications

Distributed Power Supplies
Notebook, Netbook Computers
Hard Disk Drives (HDD)
Solid State Drives (SSD)
Processor Supply
Battery Powered Applications

3 Description

The TLV62090 device is a high frequency synchronous step-down converter optimized for small solution size, high efficiency and suitable for battery powered applications. To maximize efficiency, the converter operates in pulse width modulation (PWM) mode with a nominal switching frequency of 1.4 MHz and it automatically enters power save mode operation at light load currents. When used in distributed power supplies and point of load regulation, the device allows voltage tracking to other voltage rails and tolerates output capacitors ranging from 10 µF up to 150 µF and beyond. Using the DCS-Control topology, the device achieves excellent load transient performance and accurate output voltage regulation.

The output voltage start-up ramp is controlled by the softstart pin, which allows operation as either a standalone power supply or in tracking configurations. Power sequencing is also possible by configuring the enable (EN) and power good (PG) pins. In power save mode, the device operates with typically 20-µA quiescent current. Power save mode is entered automatically and seamlessly, maintaining high efficiency over the entire load current range.

The device is available in a 3 mm x 3 mm 16-pin VQFN (RGT) package.

Device Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TLV62090	VQFN (16)	3.00 mm x 3.00 mm

For all available packages, see the orderable addendum at the end of the datasheet.

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Typical Application Schematic

Efficiency vs Output Current

4 Revision History

Changes from E Revision (January 2016) to F Revision

Added Feature: Pin-to-Pin Compatible with TPS62090, TLV62095 and TPS62095Go
Added Feature: For Improved Feature Set, See TPS62090Go
Added WEBENCH information to the Features, Detailed Design Procedure, and Device Support sectionsGo
Added SW (AC, less than 10 ns) to the Absolute Maximum Rating tableGo
Added additional frequency curves to the Typical Characteristics sectionGo
Added Table 1, Power Good Pin LogicGo

Changes from D Revision (September 2015) to E Revision

Changed title From: 3A High Efficient Synchronous To: 3A High Efficiency Synchronous Go
Changed Features From: 95% Converter Efficiency To: Up To 98% EfficiencyGo
Changed Features From: Two Level Short Circuit Protection To: Hiccup Short Circuit ProtectionGo
Changed text in the Description From: the device operates at typically 20 µA quiescent current. To: the device operates with typically 20-µA quiescent current.Go
Deleted Note from the pinout drawing: The exposed Thermal Pad is connected to AGND.Go
Changed the Pin Functions table I/O columnGo
Changed the Pin Functions table Description column for pins FB, EN, and Thermal Pad Go
Added pins CN and CP to the Voltage range in Absolute Maximum Ratings Go
Deleted "Continuous total power dissipation" from Absolute Maximum RatingsGo
Deleted Note 1 from Recommended Operating Conditions Go
Added EN = Low to the Description of R_PD in Electrical Characteristics tableGo
Deleted I_PG from the Electrical Characteristics tableGo
Changed L_IMF to I_LIMF for High side FET switch current limit in the Electrical Characteristics tableGo
Changed V_sto V_OUT for Output voltage range in the Electrical Characteristics tableGo
Changed Figure 1 through Figure 2 Go
Added Note 1 to the Functional Block Diagram Go
Changed "Softstart (SS) and Output Capacitor during Startup" To: Softstart (SS) and Hiccup Current Limit During StartupGo
Changed text From: "start-up especially for larger output capacitors >22 µF." To: "start-up especially for larger output capacitors." in Softstart (SS) and Hiccup Current Limit During StartupGo
Rewrite the description in Voltage Tracking (SS)Go
Deleted text "in PFM mode and with a minimum quiescent current while" from Power Save Mode Operation Go
Changed V_OUT(max)to V_OUT in Equation 4 Go
Deleted text "V_OUT_(max) = nominal output voltage plus maximum output voltage tolerance" from Equation 4Go
Added Note to Application and Implementation Go
Added 10 nF to the description of C4, C5 in Table 3 Go
Updated the Isat/DCR (max) column of Table 5Go
Deleted text" The inductor needs to be rated for a saturation current as high as the typical switch current limit, of 4.6 A or according to Equation 5 and Equation 6." from Inductor Selection Go
Changed Equation 5 and Equation 6 Go
Changed the Input and Output Capacitor Selection section Go
Changed Figure 19 Go
Changed Figure 20 Go

Changes from C Revision (May 2014) to D Revision

Moved Storage temperature From: ESD Ratings To: Absolute Maximum RatingsGo
Changed table From: Handling Ratings To: ESD Ratings Go
Added PWM mode, T_J = 25°C to Feedback voltage accuracy section of the Electrical Characteristics table Go

Changes from B Revision (April 2012) to C Revision

Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. Go
Deleted text: "TPS62090 adjustable output version" from the Feedback voltage accuracy section of the Electrical Characteristics tableGo
Changed Figure 1 From: Resistance (Ω) To: Resistance (mΩ)Go
Added Application Curves to the Application Information sectionGo
Deleted Typical applications from the Application Information section for: 1.8 V Adjustable Version, 1.5 V Adjustable Version, 1.2 V Adjustable Version and 1.05 V Adjustable VersionGo

Changes from A Revision (March 2012) to B Revision

Changed the Input voltage range MAX value From: 6V To 5.5V in Electrical CharacteristicsGo

Changes from * Revision (March 2012) to A Revision

Changed Vin From: 2.5V to 6V To: 2.5V to 5.5V in Figure 11Go

5 Pin Configuration and Functions

RGT Package

16-Pin VQFN

Top View

Pin Functions

PIN		I/O	DESCRIPTION
NAME	NO.	I/O	DESCRIPTION
SW	1, 2	I/O	Switch pin of the power stage.
DEF	3	I	This pin is used for internal logic and needs to be pulled high. This pin should not be left floating.
PG	4	O	Power good open drain output. This pin is high impedance if the output voltage is within regulation. This pin is pulled low if the output is below its nominal value. The pull up resistor can not be connected to any voltage higher than the input voltage of the device.
FB	5	I	Feedback pin of the device. Connect a resistor divider to set the output voltage.
AGND	6		Analog ground.
CP	7	I/O	Internal charge pump flying capacitor. Connect a 10 nF capacitor between CP and CN.
CN	8	I/O	Internal charge pump flying capacitor. Connect a 10 nF capacitor between CP and CN.
SS	9	I	Softstart control pin. A capacitor is connected to this pin and sets the softstart time. Leaving this pin floating sets the minimum start-up time.
AVIN	10	I	Bias supply input voltage pin.
PVIN	11,12	I	Power supply input voltage pin.
EN	13	I	Device enable. To enable the device this pin needs to be pulled high. Pulling this pin low disables the device. This pin has a pull down resistor of typically 400 kΩ, which is active when EN is low.
PGND	14,15		Power ground connection.
VOS	16	I	Output voltage sense pin. This pin needs to be connected to the output voltage.
Exposed Thermal Pad			The exposed thermal pad is connected to AGND. It must be soldered for mechanical reliability.