PT5407N【PDF 4/15 页】REG SW 5/3.3VIN 1.0V 6A HORZ

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PT5408

6-A 5-V/3.3-V Input Adjustable

SWIFT? Power Module

SLTS169C - MAY 2002 - REVISED OCTOBER 2003

Electrical Specifications (PT5408 only)

Unless otherwise stated, T a =25 °C, V in =3.3 V, C 1 =100 μF, C 2 =0 μF, and I o =I o max

PT5408

Characteristics

Output Current

Input Voltage Range

Set-Point Voltage Tolerance

Temperature Variation

Line Regulation

Load Regulation

Total Output Variation

Efficiency

V o Ripple (pk-pk)

Transient Response

Current Limit Threshold

Output Voltage Adjust

Switching Frequency

Under-Voltage Lockout

Symbols

I o

V in

V o tol

? Reg temp

? Reg line

? Reg load

? Reg tot

η

V r

t tr

? V tr

I lim

V o adj

? s

UVLO

Conditions

V in =3.3 V

Over I o range

–40 °C <T a < +85 °C

Over V in range

Over I o range

Includes set-point, line, load,

–40 °C ≤ T a ≤ +85 °C

I o =4 A

20 MHz bandwidth

1 A/μs load step, 50 to 100 % I o max,

C 2 =100 μF

Recovery time

V o over/undershoot

? V o = –50 mV

Over V in and I o ranges

V in increasing

V in decreasing

Min

0

3.1

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Typ

—

—

±0.5

±5

±10

—

92

15

50

50

13

±10

700

2.95

2.8

Max

6 (1)

3.6

±2

—

—

—

±3

—

—

—

—

—

—

—

—

Units

%V o

%V o

mV

mV

%V o

mVpp

μSec

mV

A

%

kHz

V

Inhibit Control (pin1)

Referenced to GND (pin3)

Input High Voltage

Input Low Voltage

V IH

V IL

V in –0.5

–0.2

—

—

Open (2)

0.8

V

Input Low Current

Standby Input Current

External Input Capacitance

I IL

I in standby

C 1

Pin 1 to GND

pins 1 & 3 connected

—

—

100 (3)

–10

1

—

—

—

—

μA

mA

μF

External Output Capacitance

C 2

0

100

(4)

1,000

μF

Reliability

MTBF

Per Bellcore TR-332

50 % stress, T a =40 °C, ground benign

48

—

—

10 6 Hrs

Notes: (1) See SOA curves or consult factory for the appropriate derating.

(2) The Inhibit control (pin 1) has an internal pull-up, and if left open-circuit the module will operate when input power is applied. A small low-leakage

(<100 nA) MOSFET is recommended to control this input. See application notes for more information.

(3) The regulator requires a minimum of 100 μF input capacitor with a minimum 300 mArms ripple current rating. For further information, consult the

related application note on Capacitor Recommendations.

(4) An external output capacitor is not required for basic operation. Adding 100 μF of distributed capacitance at the load will improve the transient response.

For technical support and further information, visit http://power.ti.com

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