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TPP2020

17-V Input, 2-A Synchronous Step-Down Voltage Regulator

Features

⚫

Wide Supply Voltage: 4.5V to 17V

Output Voltage Range: 0.76 V to 7 V

Internal Power FET：150mΩ and 80mΩ

High-Efficiency Synchronous-Mode Operation

650 kHz Switching Frequency

Internal Light Load Power-Save Mode for High Efficiency

at Light Load

Internal Soft-Start

Over-Current Protection and Hiccup

Thermal Shutdown

Small outline package TSOT23-6, SOT523

–40°C

to 125°C Operation Ambient Temperature Range

Description

The TPP2020 is a simple, easy to use, 2-A output, synchronous,

step-down,

MOSFETs.

The TPP2020 provides a fast-transient response and supports

both low equivalent series resistance (ESR) output polymer

capacitors

and

ceramic

capacitors

with

external

compensation components.

TPP2020 offers a very compact solution to achieve a 2A

continuous output current over a wide input supply range, with

excellent load and line regulation.

Protection features include over-current protection and thermal

shutdown.

The devices are available in a 6-pin TSOT23-6 package, and

specified from –40°C to 125°C of ambient temperature

switch-mode

converter

with

internal

power

Applications

⚫

Digital TV Power Supply

Digital Set Top box (STB)

Video Surveillance

Networking Home Terminal

General Purpose

BST

GND

TP2020

VBS T

VOUT

OUT

VIN

VFB

VOUT

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Rev. 1.0

TPP2020

17-V Input, 2-A Synchronous Step-Down Voltage Regulator

Table of Contents

Features ........................................................................................................................................................................... 1

Applications ..................................................................................................................................................................... 1

Description....................................................................................................................................................................... 1

Revision History .............................................................................................................................................................. 3

Pin Configuration ............................................................................................................................................................ 3

Order Information ............................................................................................................................................................ 3

Absolute Maximum Ratings

Note 1

................................................................................................................................... 3

ESD Rating ....................................................................................................................................................................... 4

Thermal Information ....................................................................................................................................................... 4

Electrical Characteristics ............................................................................................................................................... 5

Typical Performance Characteristics ............................................................................................................................ 6

Detailed Description ..................................................................................................................................................... 10

Overview .................................................................................................................................................................................... 10

Functional Block Diagram .......................................................................................................................................................... 10

Feature Description .................................................................................................................................................................... 10

Constant On-Time Control ...................................................................................................................................... 10

Improved Light-Load Mode..................................................................................................................................... 10

Soft-Start with Pre-Biased Capability ...................................................................................................................... 10

Over Current Protection ......................................................................................................................................... 11

Output Undervoltage Hiccup Protection ................................................................................................................ 11

Undervoltage Lockout (UVLO) Protection .............................................................................................................. 11

Over Temperature Shutdown ................................................................................................................................. 11

Application ..................................................................................................................................................................... 11

Application Information ................................................................................................................................................................11

Typical Application .......................................................................................................................................................................11

Component Selection.............................................................................................................................................. 12

Layout Recommendations ........................................................................................................................................... 13

Tape and Reel Information ........................................................................................................................................... 14

Package Outline Dimensions ....................................................................................................................................... 15

TSOT23-6 .................................................................................................................................................................................. 15

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Rev. 1.0

TPP2020

17-V Input, 2-A Synchronous Step-Down Voltage Regulator

Revision History

Date

2020/2/19

Revision

1.0

Notes

Release

Pin Configuration

TSOT23-6

Top View

GND

VBST

VIN

VFB

Figure 1 Pin function

NAME

NO.

DESCRIPTION

GND

VIN

VFB

VBST

Ground pin. Power and controller circuit ground. Use star connection to GND pin with good

contact

Switching node pin. Voltage switching between high-side FET and low-side FET. Connect 2.2-µH

between SW and OUT.

Supply input pin. Connect decoupling 2×10-µF and 1×0.1-µF capacitors between VIN and GND

pins.

Voltage feedback pin. Connect to output voltage with feedback resistor divider.

Enable input. Active high. Internally weak pull-down resistors.

High-side MOSFET gate supply pin. Connect 0.1-µF between VBST and SW pins.

Order Information

Order Number

TPP2020-6TR

Operating Temperature

Range

-40 to 125°C

Package

TSOT23-6

Marking Information

202

MSL

Transport Media, Quantity

Tape and Reel, 3000

Absolute Maximum Ratings

Note 1

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Rev. 1.0

TPP2020

17-V Input, 2-A Synchronous Step-Down Voltage Regulator

Parameters

Supply Voltage, VIN

Switching Node Voltage, SW

Bootstrap Voltage, VBST – SW

Feedback Voltage, FB

Enable Input, EN

Maximum Junction Temperature

Operating Temperature Range

Storage Temperature Range

Lead Temperature (Soldering, 10 sec)

Rating

− 0.3 V to 18 V

− 0.3 V to VIN + 0.3 V

− 0.3 V to 6.5 V

− 0.3 V to 18 V

150°C

–40 to 125°C

–65 to 150°C

260°C

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to

any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.

Note 2: The inputs are protected by ESD protection diodes to each power supply. If the input extends more than 300mV beyond the

power supply, the input current should be limited to less than 10mA.

Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power

supply voltage and how many amplifiers are shorted. Thermal resistance varies with the amount of PC board metal connected to the

package. The specified values are for short traces connected to the leads.

ESD Rating

Symbol

HBM

CDM

Parameter

Human Body Model ESD

Charged Device Model ESD

Condition

ANSI/ESDA/JEDEC JS-001

ANSI/ESDA/JEDEC JS-002

Minimum Level

1.5

Unit

Thermal Information

Package Type

TSOT23-6

100

Unit

°C/W

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Rev. 1.0

TPP2020

17-V Input, 2-A Synchronous Step-Down Voltage Regulator

Electrical Characteristics

All test condition is VIN = 12V, T

= -40°C to 125°C, unless otherwise noted.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Power Supply

VIN

QSD

Supply Voltage Range

Operating supply current

Shut down supply current

4.5

500

μA

VFB Voltage

Threshold Voltage

PFM mode

PWM mode

VFB

MOSFFET

RDSON

HS Switching On Resistance

LS Switching On Resistance

165

mΩ

VFB

Threshold Current

749

-0.1

800

761

787

0.1

Current Limit

Limit

Current Limit

Thermal Shutdown

Thermal shut down temperature

Thermal Hysteresis

Output Under Voltage

OVP

UVLO

UVLO Threshold

Output OVP threshold

0.5

165

°C

ON-Time Control

OFF

On Time

Off Time

130

200

LOGIC THRESHOLD

ENH

ENL

EN high-level input voltage

EN low-level input voltage

EN pin resistance to GND

200

0.7

kΩ

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Rev. 1.0