PT6948 datasheet(2/9 Pages) TI

Part #	PT6948

Description	6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator

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Manufacturer	TI [Texas Instruments]

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For technical support and more information, see inside back cover or visit www.ti.com

PT6940 Series

6-A Dual Output 5-V/3.3-V Input

Integrated Switching Regulator

General Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330µF, Co1 =330µF, Co2 =330µF, and Io1/Io2 =Iomax)

PT6940 Series

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Current

Io (1)

Ta =25°C, natural convection

0.1 (2)

—6

A

Ta =60°C, 200LFM airflow

0.1(2)

—6

Input Voltage Range

Vin

OverIoRange

Vo1 ≤2.5V

3.1

—

5.5

V

Vo1 >2.5V

4.5

—

5.5

Set Point Voltage Tolerance

Vo tol

—

±0.5

±2

%Vo

Temperature Variation

Regtemp

–40°

≤Ta≤ +85°C, Io =Iomin

—

±0.5

—

%Vo

Line Regulation

Regline

Over Vin range

—

±5

±10

mV

Load Regulation

Regload

Over Io range

—

±5

±10

mV

Total Output Voltage Variation

∆Votot

Includes set-point, line, load,

Vo =3.3V

—

±43

±100

–40°

≤Ta ≤ +85°C

Vo =2.5V

—

±35

±75

Vo =1.8V

—

±28

±54

mV

Vo =1.5V

—

±25

±45

Vo =1.2V

—

±22

±36

Efficiency

η

Vin =5V, Io1 = Io2 =4A

PT6941

—

92

—

PT6942

—

91

—

PT6943

—

90

—

%

PT6944

—

90

—

PT6946

—

89

—

PT6947

—

88

—

PT6948

—

87

—

Vo Ripple (pk-pk)

Vr

20MHz bandwidth

—

35

—

mVpp

TransientResponse

ttr

1A/µs load step, 50% to 100% Iomax

—

60

—

µs

∆Vtr

Vo over/undershoot

—

±70

—

mV

Short Circuit Threshold

Isc(pk)

Reset followed by auto-recovery

—

13 (3)

—A

Switching Frequency

ƒo

Over Vin range

300

350

400

kHz

STBY* (Pin 1)

Referenced to GND (pin 7)

Input High Voltage

VIH

—

Open (4)

V

Input Low Voltage

VIL

–0.1

—

+0.4

Input Low Current

IIL

—

-0.5

–

mA

Quiescent Current

Iin standby

pin 1 to GND

—

10

20

mA

External Output Capacitance

Both outputs

330

—

TBD

µF

Operating Temperature Range

Ta

Over Vin Range

–40 (5)

—

+85 (6)

°C

Storage Temperature

Ts

—

–40

—

+125

°C

Mechanical Shock

Per Mil-STD-883D, Method 2002.3

1msec,½Sine,mounted

—

TBD

—

G’s

Mechanical Vibration

Mil-STD-883D Method 2007.2,

Vertical

—

TBD (7)

—

G’s

20-2000 Hz

Horizontal

—

TBD (7)

—

Weight

—

Vertical/Horizontal

—

34

—

grams

Flammability

—

MeetsUL94V-O

Notes:

(1) The outputs, Vo1 and Vo2, have similar characteristics. The applicable performance parameters are defined according to output voltage.

(2) The minimum output current applies to each output. The module will operate at no load with reduced specifications.

(3) A short-circuit load fault at either output causes the module to continuously reset, affecting both outputs.

(4) The STBY* control (pin 1) 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 approximately the input voltage, Vin. Refer to the application notes for interface considerations.

(5) For operating temperatures below 0°C, Cin, Co1, and Co2 must have stable characteristics. Use either tantalum or Oscon® capacitors.

(6) See Safe Operating Area curves for the specific output voltage combination, or contact the factory for the appropriate derating.

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

Input/Output Capacitors: The PT6940 series requires a 330µF electrolytic capacitor at the input and both outputs for proper operation (300µF for Oscon® or low ESR

tantalum). In addition, the input capacitance must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic load applications, additional capacitance

may be required. Refer to the application notes for more information.

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