TPS565208

Synchronous Buck Converter

The TPS565208 is a synchronous buck converter from Texas Instruments. View the full TPS565208 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Key Specifications

Parameter	Value
Output Current	5 A (maximum)
Soft Start Time	1.0 ms
Package Dimensions	1.60 mm × 2.90 mm
Input Voltage Range	4.5 V to 17 V
Switching Frequency	450 kHz to 550 kHz
Output Voltage Range	0.76 V to 7 V
Low Side FET Resistance	16 mΩ (typ)
Shutdown Supply Current	0.8 μA (typ) to 5 μA (max)
High Side FET Resistance	31 mΩ (typ)
Feedback Voltage Accuracy	1%
Operating Junction Temperature Range	-40°C to 125°C
Operating Supply Current Non Switching	590 μA (typ) to 780 μA (max)

Overview

Part: TPS565208 — Texas Instruments

Type: Synchronous Step-Down Voltage Regulator

Description: A simple, easy-to-use, 4.5–17 V input, 5-A synchronous step-down converter with integrated FETs, D-CAP2™ mode control, and 500-kHz switching frequency.

Operating Conditions:

Supply voltage: 4.5–17 V
Operating junction temperature: -40 to 125 °C
Output voltage range: 0.76 V to 7 V
Switching frequency: 500 kHz

Absolute Maximum Ratings:

Max supply voltage (VIN, EN): 19 V
Max continuous current: 8 A (Current limit)
Max junction/storage temperature: 150 °C

Key Specs:

Output current: 5 A (Maximum)
High-side switch resistance (RDS(on)h): 31 mΩ (TA = 25°C, VBST - VSW = 5.5 V)
Low-side switch resistance (RDS(on)l): 16 mΩ (TA = 25°C)
Feedback voltage accuracy: 1% (753 mV to 767 mV for VFB threshold)
Shutdown supply current: 0.8 μA (Typ, EN = 0 V)
Soft-start time: 1.0 ms (Internal)
Thermal shutdown threshold: 172 °C (Typ)
Output UVP threshold: 65 % (Hiccup detect)

Features:

Integrated 31-mΩ and 16-mΩ FETs
D-CAP2™ Mode Control with Fast Transient Response
Continuous Current Mode
Low Shutdown Current of Less than 1 μA
Startup from Pre-biased Output Voltage
Cycle-by-Cycle Current Limit
Hiccup-mode Overcurrent Protection
Non-Latch UVP and TSD Protections
Fixed Soft Start: 1.0 ms

Applications:

Digital TV Power Supply
High Definition Blu-ray™ Disc Players
Networking Home Terminal
Digital Set Top Box (STB)
Surveillance

Package:

DDC (6) (1.60 mm × 2.90 mm SOT)

Features

1 · 5-A Maximum Output Current
Integrated 31-m Ω and 16-m Ω FETs
D-CAP2™ Mode Control with Fast Transient Response
Input Voltage Range: 4.5 V to 17 V
Output Voltage Range: 0.76 V to 7 V
Continuous Current Mode
500-kHz Switching Frequency
Low Shutdown Current of Less than 1 μA
1% Feedback Voltage Accuracy
Startup from Pre-biased Output Voltage
Cycle-by-Cycle Current Limit
Hiccup-mode Overcurrent Protection
Non-Latch UVP and TSD Protections
Fixed Soft Start: 1.0 ms
Create a Custom Design Using the TPS565208 With the WEBENCH ® Power Designer

Applications

Digital TV Power Supply
High Definition Blu-ray™ Disc Players
Networking Home Terminal
Digital Set Top Box (STB)
Surveillance

Pin Configuration

Electrical Characteristics

TJ = -40°C to 125°C, VIN = 12 V (unless otherwise noted)

	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
SUPPLY CURRENT	SUPPLY CURRENT	SUPPLY CURRENT	SUPPLY CURRENT	SUPPLY CURRENT	SUPPLY CURRENT	SUPPLY CURRENT
I VIN	Operating - non-switching supply current	V IN current, EN = 5 V, V FB = 1 V		590	780	μA
I VINSDN	Shutdown supply current	V IN current, EN = 0 V		0.8	5	μA
LOGIC THRESHOLD	LOGIC THRESHOLD	LOGIC THRESHOLD	LOGIC THRESHOLD	LOGIC THRESHOLD	LOGIC THRESHOLD	LOGIC THRESHOLD
V ENH	EN high-level input voltage		1.6			V
V ENL	EN low-level input voltage				0.8	V
R EN	EN pin resistance to GND	V EN = 12 V	120	245	400	k Ω
V FB VOLTAGE AND DISCHARGE RESISTANCE	V FB VOLTAGE AND DISCHARGE RESISTANCE	V FB VOLTAGE AND DISCHARGE RESISTANCE	V FB VOLTAGE AND DISCHARGE RESISTANCE	V FB VOLTAGE AND DISCHARGE RESISTANCE	V FB VOLTAGE AND DISCHARGE RESISTANCE	V FB VOLTAGE AND DISCHARGE RESISTANCE
V FBTH	V FB threshold voltage		753	760	767	mV
I VFB	V FB input current	T A = 25°C, V FB = 0.8 V		0	±0.1	μA
MOSFET	MOSFET	MOSFET	MOSFET	MOSFET	MOSFET	MOSFET
R DS(on)h	High-side switch resistance	T A = 25°C, V BST - V SW = 5.5 V		31		m Ω
R DS(on)l	Low-side switch resistance	T A = 25°C		16		m Ω
CURRENT LIMIT	CURRENT LIMIT	CURRENT LIMIT	CURRENT LIMIT	CURRENT LIMIT	CURRENT LIMIT	CURRENT LIMIT
I OCL	Current limit		5.3	6.7	8	A
THERMAL SHUTDOWN	THERMAL SHUTDOWN	THERMAL SHUTDOWN	THERMAL SHUTDOWN	THERMAL SHUTDOWN	THERMAL SHUTDOWN	THERMAL SHUTDOWN
T	Thermal shutdown	Shutdown temperature		172		°C
SDN	threshold (1)	Hysteresis		38
ON-TIME TIMER CONTROL	ON-TIME TIMER CONTROL	ON-TIME TIMER CONTROL	ON-TIME TIMER CONTROL	ON-TIME TIMER CONTROL	ON-TIME TIMER CONTROL	ON-TIME TIMER CONTROL
t OFF(MIN)	Minimum off time	V FB = 0.61 V		236	280	ns
SOFT START	SOFT START	SOFT START	SOFT START	SOFT START	SOFT START	SOFT START
t SS	Soft-start time	Internal soft-start time		1.0		ms
FREQUENCY	FREQUENCY	FREQUENCY	FREQUENCY	FREQUENCY	FREQUENCY	FREQUENCY
F SW	Switching frequency	V IN = 12 V, V OUT = 5 V, CCM mode		500		kHz
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION	OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION	OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION	OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION	OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION	OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION	OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V UVP	Output UVP threshold	Hiccup detect (H > L)		65		%
T HICCUP_WAIT	Hiccup on time			1.8		ms
T HICCUP_RE	Hiccup time before restart			14.9		ms
UVLO	UVLO	UVLO Wake up VIN voltage	UVLO	UVLO 4.0	UVLO 4.3	UVLO
UVLO	UVLO threshold	Shutdown VIN voltage	3.3	3.6		V
UVLO		Hysteresis VIN voltage (1)		0.4

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

		MIN	MAX	UNIT
Input voltage	VIN, EN	-0.3	19	V
Input voltage	VBST	-0.3	25	V
Input voltage	VBST (10 ns transient)	-0.3	27	V
Input voltage	VBST (vs SW)	-0.3	6.5	V
Input voltage	VFB	-0.3	6.5	V
Input voltage	SW	-2	19	V
Input voltage	SW (10 ns transient)	-3.5	21	V
Operating junction temperature, T J	Operating junction temperature, T J	-40	150	°C
Storage temperature, T stg	Storage temperature, T stg	-55	150	°C

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

			MIN	MAX	UNIT
V IN	Supply input voltage range	Supply input voltage range VBST VBST (10 ns transient) VBST (vs SW)	4.5 -0.1 -0.1 -0.1	17 23 26 6	V
V I	Input voltage range	EN VFB SW SW (10 ns transient)	-0.1 -0.1 -1.8 -3.5	17 5.5 17 20	V
T J	Operating junction temperature	Operating junction temperature	-40	125	°C

Thermal Information

THERMAL METRIC (1)	THERMAL METRIC (1)	TPS565208 DDC (SOT) 6 PINS	UNIT
R θ JA	Junction-to-ambient thermal resistance	95.9	°C/W
R θ JC(top)	Junction-to-case (top) thermal resistance	35.6	°C/W
R θ JB	Junction-to-board thermal resistance	16.4	°C/W
ψ JT	Junction-to-top characterization parameter	1.4	°C/W
ψ JB	Junction-to-board characterization parameter	16.4	°C/W

Typical Application

The device is a typical step-down DC-DC converter for converting a higher dc voltage to a lower dc voltage with a maximum available output current of 5 A. The following design procedure can be used to select component values for the TPS565208. Alternately, the WEBENCH ® software may be used to generate a complete design. The WEBENCH software uses an iterative design procedure and accesses a comprehensive database of components when generating a design. This section presents a simplified discussion of the design process.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
TPS565208DDCR	Texas Instruments	SOT-23-6 THIN
TPS565208DDCR.A	Texas Instruments	SOT-23
TPS565208DDCT	Texas Instruments	SOT-23-6 THIN
TPS565208DDCT.A	Texas Instruments	SOT-23-6 THIN

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