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PT8120 Series

30-A 12-V Input Programmable

Integrated Switching Regulator

PT8121 /2 /3 /5 Only

Characteristics

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Natural convection or

—30

A

60°C with 200LFM airflow

—28

Input Voltage Range

10.8

—

13.2

V

Set-Point Voltage Tolerance

—

±1

±2

%V

Line Regulation

—

±10

—

mV

Load Regulation

—

±10

—

mV

Temperature Variation

–40°C

—

±0.5

—

Total Output Voltage Variation

Includes set-point, line load,

——±3

%V

–40°C

Efficiency

η

—

94

—

—

92

—

—

90

—

%

—

86

—

—

84

—

Vo

=1.2V

—

81

—

—

93

—

—

91

—

—

88

—

%

—

84

—

—

82

—

—

78

—

20MHz bandwidth

—

20

—

mV

Transient Response

1A/µs load step, 50% to 100% Iomax

—

50

—

µSec

—

100

—

mV

Over-Current Threshold

Reset followed by auto-recovery

—

40

—

A

—

45

—

Switching Frequency

Over load range

300

350

400

kHz

Standby Control (pin 6)

Referenced to GND (pins 17–22)

Input High Voltage

—

—

V

Input Low Voltage

-0.2

—

0.8

Input Low Current

Pin 6 to GND

—

0.5

—

mA

Standby Input Current

Pin 6 to GND

—

35

—

mA

External Output Capacitance

See PT812x application schematic

—

30,000

µF

External Input Capacitance

See PT812x application schematic

1,500

—

—

µF

Operating Temperature Range

°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

—

—

G’s

20-2000 Hz, soldered in PCB

Weight

—

Vertical/Horizontal

—

55

—

grams

Flammability

—

Materials meet UL 94V-0

Notes: (1) ISR-will operate down to no load with reduced specifications.

(2) The Standby input (pin 6) has an internal pull-up. If it is left open-circuit the PT812x will operate when input power is applied. A low-leakage

MOSFET is recommended to control this input. The open-circuit voltage is nominally 5V. See application notes for interface considerations.

(3) The PT8120 regulators require a minimum of 660µF, low ESR ouput capacitance (1,200µF for standard aluminum electrolytic) for proper operation.

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

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

Input Filter: An input filter inductor is optional for most applications. The inductor must be rated to handle the projected input current. A rating of 10ADC for

load applications, additional capacitance may be required. For more information consult the application note on capacitor selection.