TPS7A7002 Very Low Input, Very Low Dropout 3-A Regulator With Enable
1 Features
- Input Voltage as Low as 1.425 V
- 380-mV Maximum Dropout at 2 A
- 600-mV Maximum Dropout at 3 A
- Adjustable Output from 0.5 V
- Protections: Current Limit and Thermal Shutdown
- Enable Pin
- 1-µA Ground Current in Shutdown Mode
- Full Industrial Temperature Range
- Available in an SOIC-8, Fully RoHS-Compliant Package
2 Applications
- Telecom and Networking Cards
- Motherboards and Peripheral Cards
- Industrial
- Wireless Infrastructure
- Set-Top Boxes
- Medical Equipment
- Notebook Computers
- Battery-Powered Systems
3 Description
The TPS7A7002 is a high-performance, positive- voltage, low-dropout (LDO) regulator designed for use in applications requiring very-low input voltage and very-low dropout voltage at up to 3 A. The device operates with a single input voltage as low as
1.425 V, and with an output voltage programmable to as low as 0.5 V. The output voltage can be set using an external divider.
The TPS7A7002 features ultra-low dropout, ideal for applications where VOUT is very close to VIN. Additionally, the TPS7A7002 has an enable pin for further reduced power dissipation while in Shutdown mode. The TPS7A7002 provides excellent regulation over variations in line, load, and temperature.
The TPS7A7002 is available in an 8-pin SO PowerPAD™ package.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS7A7002 | SO PowerPAD (8) | 3.90 mm × 4.89 mm |
- For all available packages, see the package option addendum at the end of the data sheet.
Typical Application
Dropout Voltage vs Output Current
(VOUT = 3.3 V)
4 Revision History
Changes from C Revision (July 2015) to D Revision
- Changed OUT pin description text from "TI recommends using at least a 4.7-μF ceramic capacitor, and up to 10 μF for a good transient response." to " A 4.7-μF or larger capacitor of any type is required for stability." for clarityGo
- Changed "operating free-air" to "junction" in Absolute Maximum Ratings table condition line Go
- Added rows for enable pin voltage, input capacitor, output capacitor, and feedforward capacitance to Recommended Operating Conditions tableGo
- Added min value of 0 to output current in Recommended Operating Conditions tableGo
- Changed note (1) in Electrical Characteristics table; deleted initial reference to R1 and updated R2 resistor rangeGo
- Changed Output Capacitor (OUT) section; reworded for clarityGo
Changes from B Revision (November 2013) 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
Changes from A Revision (September 2013) to B Revision
- Changed data sheet status from product preview to production data.Go
- Added pin 1 identifier (black bar) to pinout diagram.Go
Changes from * Revision (May 2013) to A Revision
- Changed product preview data sheetGo
5 Pin Configuration and Functions
Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| EN | 2 | I | Enable input. Pulling this pin to less than 0.5 V turns the regulator off. Connect to VIN if not being used. |
| FB | 7 | I | This pin is the output voltage feedback input through voltage dividers. See Table 2 for more details. |
| GND | 8 | — | Ground pin |
| IN | 3 | I | Input pin. Although it is not required for stability, TI recommends connecting a 1-μF to 10-μF capacitor with low equivalent series resistance (ESR) across this pin and GND. |
| NC | 1, 4, 5 | — | Not internally connected. The NC pins are not connected to any electrical node. TI recommends connecting the NC pins to large-area planes. |
| OUT | 6 | O | Regulated output pin. A 4.7-μF or larger capacitor of any type is required for stability. |
| PowerPAD | — | — | TI strongly recommends connecting the thermal pad to a large-area ground plane. If an electrically floating, dedicated thermal plane is available, the thermal pad can also be connected to it. |
