TEXAS INSTRUMENTS PTH04070W Technical data

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STANDARD APPLICATION

GND

SET

(Required)

5 4

PTH04070W

(Top View)

C3* 47 F Electroytic (Recommended)

C2* 47 F Ceramic (Required)

C1* 47 F Ceramic (Required)

Inhibit

*See The Capacitor Application Information

#See The Specification Table for Value

0.05 W#, 1%

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3-A, 3.3/5-V INPUT ADJUSTABLE SWITCHING REGULATOR

PTH04070W

SLTS227 – SEPTEMBER 2004

FEATURES

• Up to 3-A Output Current at 85 ° C

• 3.3-V / 5-V Input Voltage

• Wide-Output Voltage Adjust

• Ambient Temp. Range: –40 ° C to 85 ° C

• Surface Mount Package

• Safety Agency Approvals:

UL/CUL 60950, EN60950 VDE (Pending)

(0.9 V to 3.6 V)

• 160 W/in

Power Density

• Efficiencies Up To 94%

APPLICATIONS

• Telecommunications, Instumentation,

and General-Purpose Circuits

• On/Off Inhibit

• Undervoltage Lockout (UVLO)

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Overtemperature Protection

DESCRIPTION

The PTH04070W is a highly integrated, low-cost switching regulator module that delivers up to 3 A of output current. Occupying less PCB area than a standard TO-220 linear regulator IC, the PTH04070W provides output current at a much higher efficiency and with much less power dissipation, thereby eliminating the need for a heat sink. Their small size (0.5 × 0.4 in), high efficiency, and low cost makes these modules attractive for a variety of applications.

The input voltage range of the PTH04070W is from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH04070W can step down to voltages as low as 0.9 V from a 5-V input bus, with typically less than 1 W of power dissipation. The output voltage can be adjusted to any voltage over the range, 0.9 V to 3.6 V, using a single external resistor. Operating features include an undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection, and overtemperature protection. Target applications include telecommunications, test and measurement applications, and high-end consumer products. The modules are available in both through-hole and surface-mount package options, including tape and reel.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PTH04070W

SLTS227 – SEPTEMBER 2004

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

PTH04070 (Basic Model)

Output Voltage Part Number Description Package Designator

0.9 V - 3.6 V

(1) Add a T suffix for tape and reel option on SMD packages.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range unless otherwise noted

stg

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Operating free-air temperature Over Vinrange -40 to 85 ° C Solder reflow temperature Surface temperature of module body or pins 235 ° C Storage temperature -40 to 125 ° C

PTH04070WAH Horizontal T/H EVD

PTH04070WAS

(1)

Horizontal SMD EVE

(1)

PTH04070 UNIT

RECOMMENDED OPERATING CONDITIONS

Input voltage 3 5.5 V Operating free-air temperature –40 85 ° C

PACKAGE SPECIFICATIONS

PTH04070x (Suffix AH & AS)

Weight 1.5 grams

Flammability Meets UL 94 V-O

Mechanical shock 500 Gs

Mechanical vibration Mil-STD-883D, Method 2007.2, 20-2000 Hz 20 Gs

(1) Qualification limit.

Per Mil-STD-883D, Method 2002.3, 1 msec, 1/2 sine, mounted

MIN MAX UNIT

(1)

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PTH04070W

SLTS227 – SEPTEMBER 2004

ELECTRICAL CHARACTERISTICS

at 25 ° C free-air temperature, VI= 5 V, VO= 3.3 V, IO= IO(Max), C1 = 47 µF, C2 = 47 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

O(tol)

O(adj)

η Efficiency

O(trip)

UVLO Undervoltage lockout V

I(stby)

MTBF Calculated reliability 48 10

Output current TA= 85 ° C, natural convection airflow 0 3 A Input voltage range Over IOrange 3 5.5 V Set-point voltage tolerance TA= 25 ° C ± 2% Temperature variation -40 ≤ TA≤ +85 ° C ±0.5% V

(1)

Line regulation Over VIrange ± 1 mV Load regulation Over IOrange ± 5 mV

Total output voltage variation 3%

Output voltage adjust range V

Includes set-point, line, load,

-40 ≤ TA≤ +85 ° C VI≥ 4.5 V 0.9 3.6 VI< 4.5 V 0.9 VI– 1.1

(1)

(2)

TA= 25 °C, IO= 2 A

= 475 Ω, VO= 3.3 V

SET

= 2.32 k Ω, VO= 2.5 V V

SET

= 4.87 k Ω, VO= 2 V 88%

SET

= 6.65 k Ω, VO= 1.8 V 87%

SET

= 11.5 k Ω, VO= 1.5 V 85%

SET

= 26.1 k Ω, VO= 1.2 V 82%

SET

= 84.5 k Ω, VO= 1 V 80%

SET

(2) (2)

92% 90%

Output voltage ripple 20 MHz bandwith 10 mV Overcurrent threshold Reset, followed by autorecovery 7 A

C3 = 47 µF, 1 A/µs load step from 50% to 100% IOmax

Transient response

Recovery time 70 µs

VOover/undershoot 100 mV VI= increasing 2.95 3 VI= decreasing 2.7 2.8 Input high voltage (VIH) VI– 0.5 Open

(3)

Inhibit control (pin 5) Input low voltage (VIL) –0.2 0.6

Input low current (IIL) –10 µA

Input standby current Pins 5 and 2 connected 1 mA Switching frequency Over VIand IOranges 700 kHz External input capacitance Ceramic type (C1) 47

Ceramic type (C2) 47

External output capacitance Nonceramic type (C3) 47

Equivalent series resistance (nonceramic) 4

(4) (5)

(5)

(7)

200

(6)

560

Per Bellcore TR-332, 50% stress, TA= 40 ° C, ground benign

µF

m Ω

Hrs

(1) The set-point voltage tolerance is affected by the tolerance and stability of R

tolerance of 1% with with 100 ppm/ ° C or better temperature stability.

(2) The minimum input voltage is 3 V or (V

2 V.

+ 1.1) V, whichever is greater. A 5-V input bus is recommended for output voltages higher than

. The stated limit is unconditionally met if R

SET

has a

SET

(3) This control pin has an internal pullup to the input voltage VI. If it is left open circuit, the module operates when input power is applied. A

small low-leakage (<100 nA) MOS field effect transistor (MOSFET) is recommended for control. See the application information for further guidance.

(4) An external 47-µF ceramic capacitor is required across the input (VIand GND) for proper operation. Locate the capacitor close to the

module.

(5) An external 47-µF ceramic capacitor is required across the output (V

module. Adding another 47 µF of electrolytic capacitance close to the load improves the response of the regulator to load transients.

and GND) for proper operation. Locate the capacitor close to the

(6) This is the calculated maximum capacitance. The minimum ESR limitation often results in a lower value. See the capacitor application

information for further guidance.

(7) This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 7 m Ω as the minimum when calculating the total equivalent

series resistance (ESR) using the max-ESR values specified by the capacitor manufacturer.

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PTH04070W

SLTS227 – SEPTEMBER 2004

PIN ASSIGNMENT

TERMINAL FUNCTIONS

TERMINAL

NAME NO.

GND 2 V

VOAdjust 4 I stability of the resistor should be 100 ppm/ ° C (or better). The set-point range is from 0.9 V to 3.6 V. The

Inhibit 5 I

I/O DESCRIPTION

1 I The positive input voltage power node to the module, which is referenced to common GND.

This is the common ground connection for the VIand VOpower connections. It is also the 0 VDC reference for the Inhibit and VOAdjust control inputs.

3 O The regulated positive power output with respect to the GND node.

A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage of the module higher than 0.9 V. If left open-circuit, the output voltage defaults to this value. The temperature

electrical specification table gives the standard resistor value for a number of common output voltages. Refer to the application information for further guidance.

The Inhibit pin is an open-collector/drain-negative logic input that is referenced to GND. Applying a low-level ground signal to this input disables the module's output. When the Inhibit control is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left open-circuit, the module will produce an output voltage whenever a valid input source is applied.

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TYPICAL CHARACTERISTICS (5-V INPUT)

0 0.5 1 1.5 2 2.5 3

100

VO = 3.3 V

VO = 2.5 V

VO = 2 V

VO = 1.8 V

VO = 1.5 V

VO = 1.2 V

VO = 1 V

Efficiency − %

IO − Output Current − A

0 0.5 1 1.5 2 2.5 3

− Output Voltage Ripple − mV V

IO − Output Current − A

0.3

0.6

0.9

1.2

1.5

0 0.5 1 1.5 2 2.5 3

− Power Dissipation − W P

IO − Output Current − A

0 0.5 1 1.5 2 2.5 3

− Output Current − A

Airflow: Nat Conv

Temperature Derating −



EFFICIENCY OUTPUT RIPPLE

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 1. Figure 2.

PTH04070W

SLTS227 – SEPTEMBER 2004

(1) (2)

POWER DISSIPATION TEMPERATURE DERATING

vs vs

OUTPUT CURRENT OUTPUT CURRENT

Figure 3. Figure 4.

(1) The electrical characteristic data has been developed from actual products tested at 25 ° C. This data is considered typical for the

converter. Applies to Figure 1 , Figure 2 , and Figure 3 .

(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum

operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 1 oz. copper. Applies to Figure 4 .

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