PTH04000WAS datasheet(3/20 Pages) TI

3 / 20 page

www.ti.com

ELECTRICAL CHARACTERISTICS

PTH04000W

SLTS247A – JUNE 2005 – REVISED JULY 2005

at 25°C free-air temperature, V

I = 5 V, VO = 3.3 V, IO = IO(Max), CI = 47 µF (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output current

TA = 25°C, natural convection

3 (1)

Input voltage range

Over IO range

3 (2)

5.5

VO(TOL)

Set-point voltage tolerance

TA = 25°C

±2% (3)

Temperature variation

–40

≤ T

A ≤ 85°C

±0.5% VO

Line regulation

Over VI range

±1

Load regulation

Over IO range

±5

Includes set-point, line, load,

Total output voltage variation

3% (3)

–40

≤ T

A ≤ 85°C

VI ≥ 4.5 V

0.9

3.6

VO(ADJ)

Output voltage adjust range

VI < 4.5 V

0.9

VI – 1.1(2)

TA = 25°C, IO = 2 A

RSET = 475 Ω, VO = 3.3 V (2)

92%

RSET = 2.32 kΩ, VO = 2.5 V (2)

89%

Efficiency

RSET = 6.65 kΩ, VO = 1.8 V

86%

RSET = 11.5 kΩ, VO = 1.5 V

84%

RSET = 26.1 kΩ, VO = 1.2 V

82%

RSET = 84.5 kΩ, VO = 1 V

78%

Output voltage ripple

20 MHz bandwith

mVPP

Overcurrent threshold

Reset, followed by autorecovery

1 A/µs load step from 50% to 100% IOmax,

CO = 47 µF

Transient response

Recovery time

µs

VO over/undershoot

100

IIL track

Track Input Current (pin 2)

Pin to GND

–130

µA

dVtrack/dt

Track Slew Rate Capability

CO ≤ CO(max)

V/ms

VI = increasing

2.95

UVLO

Undervoltage lockout

VI = decreasing

2.7

2.8

Input high voltage (VIH)

VI – 0.5

Open (4)

Inhibit control (pin 4)

Input low voltage (VIL)

–0.2

0.6

Input low current (IIL)

µA

II (STBY)

Input standby current

Pins 4 and 2 connected, pin 2 open

Switching frequency

Over VI and IO ranges

700

kHz

External input capacitance

Ceramic type (C1)

47 (5)

µF

Ceramic type (C2)

0 (6)

150

µF

External output capacitance (6)

Nonceramic type (C3)

47 (6)

560 (7)

Equivalent series resistance (nonceramic)

4 (8)

Ω

Per Telcordia SR-332, 50% stress,

MTBF

Calculated reliability

106 Hr

TA = 40°C, ground benign

(1)

See SOA temperature derating curves to identify maximum output current at higher ambient temperatures.

(2)

The minimum input voltage is 3 V or (VO + 1.1) V, whichever is greater. A 5-V input bus is recommended for output voltages higher than

2 V.

(3)

The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a

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

(4)

This control pin has an internal pullup to the input voltage VI. An external pullup must not be used. 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.

(5)

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

module.

(6)

An external output capacitor is not required for basic operation. Additional capacitance at the load improves the transient response.

(7)

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

information for further guidance.

(8)

This is the minimum 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.

PTH04000WAS Datasheet(PDF) 3 Page - Texas Instruments

PTH04000WAS Datasheet(HTML) 3 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Datasheet Download

Link URL