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  • TPS7A7002 Very Low Input, Very Low Dropout 3-A Regulator With Enable

    • SBVS209D May   2013  – April 2017 TPS7A7002

      PRODUCTION DATA.  

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  • TPS7A7002 Very Low Input, Very Low Dropout 3-A Regulator With Enable
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Internal Current Limit
      2. 7.3.2 Enable (EN)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Dropout Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Capacitor (IN)
      2. 8.1.2 Output Capacitor (OUT)
      3. 8.1.3 Feedback Resistors (FB)
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Consideration
    4. 10.4 Power Dissipation
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DDA|8
    • MPDS092F
Thermal pad, mechanical data (Package|Pins)
  • DDA|8
    • PPTD178C
Orderable Information
  • sbvs209d_oa
  • sbvs209d_pm
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DATA SHEET

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
  1. For all available packages, see the package option addendum at the end of the data sheet.

Typical Application

TPS7A7002 pg1_sbvs209.gif

Dropout Voltage vs Output Current
(VOUT = 3.3 V)

TPS7A7002 g003_bvs134.png

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

DDA Package
8-Pin SO PowerPAD
Top View
TPS7A7002 po_SBVS134.gif

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.

6 Specifications

6.1 Absolute Maximum Ratings

over junction temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Voltage IN –0.3 7 V
EN, FB, OUT –0.3 VIN + 0.3(2)
Current OUT Internally limited A
Temperature Operating virtual junction, TJ –55 150 °C
Storage temperature, Tstg –55 150
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) The absolute maximum rating is VIN + 0.3 V or 7 V, whichever is smaller.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN NOM MAX UNIT
VIN Input voltage 1.425 6.5 V
VEN Enable pin voltage 0 VIN V
CIN Input capacitor 1 10 µF
COUT Output capacitor(1)(2) 4.7 10 200 µF
CFB Feedforward capacitance 0 100 nF
IOUT Output current 0 3 A
TJ Junction temperature –40 125 °C
(1) See Figure 1 and Figure 2 for additional output capacitor ESR requirements.
(2) For output capacitors larger than 47 µF, a feedforward capacitor of at least 220 pF must be used.

6.4 Thermal Information

THERMAL METRIC(1) TPS7A7002 UNIT
DDA (SO PowerPAD)
8 PINS
RθJA Junction-to-ambient thermal resistance 46.4 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 54.2 °C/W
RθJB Junction-to-board thermal resistance 29.9 °C/W
ψJT Junction-to-top characterization parameter 10.2 °C/W
ψJB Junction-to-board characterization parameter 29.8 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 6.8 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

Over the full operating temperature range (see Recommended Operating Conditions), VEN = 1.1 V, VFB = VOUT(1), 1.425 V ≤ VIN ≤ 6.5 V, 10 µA ≤ IOUT ≤ 3 A, COUT = 10 μF (unless otherwise noted). Typical values are at TJ = 25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT VOLTAGE
IGND GND pin current VIN = 3.3 V,
50-Ω load resistor between OUT and GND		 3 mA
Shutdown GND pin current VIN = 6.5 V, VEN = 0 V 5 µA
OUTPUT VOLTAGE
VOUT Output voltage accuracy(2)(3) VIN = VOUT + 0.5 V(4), IOUT = 10 mA –2% 2%
VIN = 1.8 V, IOUT = 0.8 A, 0°C ≤ TJ = TA ≤ 85°C –2% 2%
IOUT = 10 mA –3% 3%
ΔVO(ΔVI) Line regulation IOUT = 10 mA 0.2 0.4 %/V
ΔVO(ΔIO) Load regulation(3) 10 mA ≤ IOUT ≤ 3 A 0.25 0.75 %/A
VDO Dropout voltage (5) IOUT = 1 A, 0.5 V ≤ VOUT ≤ 5 V 200 mV
IOUT = 2 A, 0.5 V ≤ VOUT ≤ 5 V 380
IOUT = 3 A, 0.5 V ≤ VOUT ≤ 4.8 V 600
ICL Output current limit VIN = 1.425 V, VOUT = 0.9 × VOUT(NOM) 3.36 A
FEEDBACK
VREF Reference voltage accuracy VIN = 3.3 V, IOUT = 10 mA 0.49 0.5 0.51 V
IFB FB pin current VFB = 0.5 V 1 µA
ENABLE
IEN EN pin current VEN = 0 V, VIN = 3.3 V 0.2 µA
VEN(LO) EN pin input low (disable) VIN = 3.3 V 0 0.5 V
VEN(HI) EN pin input high (enable) VIN = 3.3 V 1.1 VIN V
TEMPERATURE
TSD Thermal shutdown temperature Shutdown, temperature increasing 160 °C
Reset, temperature decreasing 140
(1) When setting VOUT to a value other than 0.5 V, connect R2 to the FB pin using 27-kΩ ≤ R2 ≤ 33-kΩ resistors. See Figure 7 for details of R1 and R2.
(2) Accuracy does not include error on feedback resistors R1 and R2.
(3) TPS7A7002 is not tested at VOUT = 0.5 V, 2.3 V ≤ VIN ≤ 6.5 V, and 500 mA ≤ IOUT ≤ 3 A because the power dissipation is higher than the maximum rating of the package. Also, this accuracy specification does not apply to any application condition that exceeds the power dissipation limit of the package.
(4) VIN = VOUT + 0.5 V or 1.425 V, whichever is greater.
(5) VDO = VIN – VOUT with VFB = GND configuration.

6.6 Typical Characteristics

for all fixed voltage versions and an adjustable version at TJ = 25°C, VEN = VIN, CIN = 10 μF, COUT = 10 μF, and using the component values in Table 2 (unless otherwise noted)
TPS7A7002 g000_bvs134.gif
COUT = 10 µF
Figure 1. Stability Curve
TPS7A7002 g002_bvs134.png
VIN = 5 V, VOUT = 3.3 V
Figure 3. Power-Supply Ripple Rejection vs Frequency
TPS7A7002 g004_bvs134.png
VOUT = 1.6 V
Figure 5. Dropout Voltage vs Output Current
TPS7A7002 g001_bvs134.gif
COUT = 100 µF
Figure 2. Stability Curve
TPS7A7002 g003_bvs134.png
VOUT = 3.3 V
Figure 4. Dropout Voltage vs Output Current
TPS7A7002 g005_bvs134.png
VOUT = 1.4 V
Figure 6. Dropout Voltage vs Output Current

 
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