PT6521 datasheet(2/8 Pages) TI

2 / 8 page

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PT6520 Series

8-A 5-V/3.3-V Input Adjustable ISR

with Short-Circuit protection

Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330µF, Cout =330µF, and Io =Iomax)

PT6520 SERIES

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Current

Over Vin range

0.1 (1)

—

8.0

Input Voltage Range

Vin

Over Io Range

Vo =3.3V

4.5

—

5.5

VDC

Vo≤2.5V

3.1

—

5.5

Set Point Voltage Tolerance

Vo tol

—

±1

±1.5

%Vo

Temperature Variation

Regtemp

–40°

≤Ta≤ +85°C, Io =Iomin

—

±0.5

—

%Vo

Line Regulation

Regline

Over Vin range

—

±5

±10

Load Regulation

Regload

Over Io range

—

±5

±10

Total Output Voltage Variation

∆Votot

Includes set-point, line, load,

—

±2±3%Vo

–40°

≤Ta ≤ +85°C

Efficiency

Io =3.0A

Vo =3.3V

—

Vo =2.5V

—

Vo =2.1V

—

Vo =1.8V

—

Vo =1.5V

—

Vo =1.2V

—

Io =8.0A

Vo =3.3V

—

Vo =2.5V

—

Vo =2.1V

—

Vo =1.8V

—

Vo =1.5V

—

Vo =1.2V

—

Vo Ripple (pk-pk)

20MHz bandwidth

—

mVpp

Transient Response

ttr

1A/µs load step, 50% to 100% Iomax

—

µs

∆Vtr

Vo over/undershoot

—

±70

—

Short Circuit Threshold

Isc threshold

—

22.5

Switching Frequency

ƒs

Over Vin and Io range

300

350

400

kHz

Remote On/Off (Pin 1)

Referenced to –Vin (pin 7)

Input High Voltage

VIH

—

Open (2)

Input Low Voltage

VIL

–0.1

—

+0.4

Input Low Current

IIL

—

–0.5

–

Standby Input Current

Iin standby

pins 3 & 7 connected

—

External Output Capacitance

Cout

See application schematic

330

—

5,000

µF

External Input Capacitance

Cin

See application schematic

330

—

µF

Operating Temperature Range

Over Vin range

-40

—

+85 (3)

°C

Storage Temperature

—

-40

—

+125

°C

Reliability

MTBF

Per Bellcore TR-332

6.3

—

106 Hrs

50% stress, Ta =40°C, ground benign

Mechanical Shock

—

Per Mil-Std-883D, method 2002.3,

—

500

—

G’s

1ms, half-sine, mounted to a fixture

Mechanical Vibration

—

Suffixes P, D, & E—

7.5

—

G’s

Mil-Std-883D, 20-2000Hz

Suffixes L & M

—

TBD (4)

—

Weight

—

Suffixes P, D, & E—

12.5

—

Suffixes R, G & B

—

16.5

—

grams

Suffixes L & M

—

15.25

—

Suffixes Q & F

—

Flammability

—

Materials meet UL 94V-0

Notes:

(1) The ISR will operate at no load with reduced specifications.

(2) The STBY* control (pin 3) has an internal pull-up and if it is left open circuit the module will operate when input power is applied. The open-circuit

voltage is typically 12.6V, and maybe as high as 15V. Refer to the application notes for other interface considerations.

(3) See Safe Operating Area curves or contact the factory for the appropriate derating.

(4) The tab pins on the 16-pin mount package types (suffixes L & M) must be soldered. For more information see the applicable package outline drawing.

Input/Output Capacitors: The PT6520 series requires a 330µF capacitor at both the input and output for proper operation in all applications. In addition, the input

capacitance (Cin) must be rated for a minimum of 1.2Arms ripple current rating. For transient or dynamic load applications, additional output capacitance (Cout) may be

necessary. The maximum allowable output capacitance is 5,000µF. For more information consult the related application note on capacitor recommendations.

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