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PT7681—5V

Typical Characteristics

PT7681

Characteristics

Symbols

Conditions

Min

Typ

Max

Units

Output Current

0

—

30

A

0

—

29

Input Voltage Range

4.5

—

5.5

V

Set-Point Voltage Tolerance

All output voltages

—

±10

mV

Temperature Variation

–40°C

—

±1

—

Line Regulation

—

±5

—

mV

Load Regulation

—

±5

—

mV

Total Output Voltage Variation

Includes set-point, line, load,

—

±1.5

±3

–40°C

Efficiency

.

—

93

—

—

92

—

%

—

89

—

—

90

—

—

87

—

%

—

83

—

20MHz bandwidth

—

40

—

Transient Response

—

25

—

µSec

—

—mV

Over-Current Threshold

Reset followed by auto-recovery

—

38

—

A

Output Margin Adjust

Pin 6 or 26 connected to pin 12

—

±5

—

%

Switching Frequency

250

300

350

kHz

STBY* Input Requirements

Input High Voltage

Referenced to GND

2.0

—

V

Input Low Voltage

-0.2

—

0.8

Input Low Current

Pin 5 to GND

—

0.3

—

mA

Standby Input Current

Pin 5 to GND

—

6

—

mA

External Capacitance

—

15,000

µF

Operating Temperature Range

–40

—

°C

Solder Reflow Temperature

Surface temperature of module pins or case

—

—

°C

Storage Temperature

—

–40

—

125

°C

Mechanical Shock

—

Per Mil-STD-883D, Method 2002.3

—

500

—

G’s

1 msec, Half Sine, mounted to a fixture

Mechanical Vibration

—

Mil-STD-883D, Method 2007.2

Suffix A

—

20

(7)

—

G’s

20-2000 Hz

Suffixes N,C

—

—

Weight

—

Vertical/Horizontal

—

36

—

grams

Flammability

—

Materials meet UL 94V-0

Notes: (1) If the remote sense ground is not used, pin 12 must be connected to pin 13 for optimum output voltage accuracy.

(2) The transient response may be improved by placing additional capacitors with low equivalent series resistance (ESR) on the output.

(3) The STBY* control (pin 5) has an internal pull-up. If it is left open-circuit, the module will operate when input power is applied. A low-leakage (<1µA)

MOSFET must be used to control this pin. The open-circuit voltage may be as high as Vin.

(4) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors.

(5) See safe Operating Area curves or consult factory for the appropriate derating.

(6) During reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215°C. For further

guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Products,” (SLTA051).

(7) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.

External Capacitors: The regulator require a minimum output capacitance of 330µF for proper operation. An input capacitance of 1500µF is also required. This

must be rated for a minimum of 1.1Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For further informa-

tion refer to the application note regarding capacitor selection for this product.

Input Filter: An input filter inductor is optional for most applications. The inductor must be sized to handle 30ADC with a typical value of 1µH.

30-A Programmable ISR

With Margin Up/Down Controls

SLTS177

B - DECEMBER 2002 - REVISED JULY 2006