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ELECTRICAL CHARACTERISTICS

PTH12050W/L

SLTS214H – MAY 2003 – REVISED OCTOBER 2007

PARAMETER

TEST CONDITIONS

PTH12050W

UNIT

MIN

TYP

MAX

85

°C, 400 LFM airflow

0

6

(1)

A

Output current

Over

60

°C, natural convection

6

(1)

A

Input voltage range

10.8

13.2

V

Set-point voltage tolerance

±2

(2)

Temperature variation

–40

°C <T

±0.5

Line regulation

±5

mV

Load regulation

±5

mV

Total output variation

Includes set-point, line, load, –40

°C ≤ T

±3

(2)

Output voltage adjust range

1.2

5.5

(1)

V

(1)

93%

(1)

91%

89%

η

Efficiency

88%

87%

86%

84%

25

mVpp

20-MHz bandwidth

1

Overcurrent threshold

Reset, followed by auto-recovery

14

A

1 A/µs load step,

Recovery time

70

µs

Transient response

100

mV

C3 = 100 µF

Track input current (pin 2)

Pin to GND

–0.13

(3)

mA

Track slew rate capability

1

V/ms

9.5

10.4

UVLO

Under-voltage lockout

V

8.8

9

Input high voltage, Referenced to GND

Open

(3)

V

Inhibit Control (pin 4)

Input low voltage, Referenced to GND

–0.2

0.5

Input low current, Pin 4 to GND

0.24

mA

Input standby current

Inhibit (pin 4) to GND, Track (pin 2) open

10

mA

Switching frequency

260

320

380

kHz

External input capacitance, C1

100

(4)

µF

Nonceramic

0

100

(5)

3300

(6)

Capacitance value

µF

External output capacitance, C3

Ceramic

0

300

Equivalent series resistance (nonceramic)

4

(7)

5.9

MTBF

Reliability

10

(1)

See the Temperature Derating (SOA) curves in the Typical Characteristics section for appropriate derating.

(2)

tolerance of 1% with 100 ppm/

°C or better temperature stability.

(3)

power is applied. A small, low-leakage (<100 nA) MOSFET or open-drain/collector voltage supervisor IC is recommended for control. Do

not place an external pull-up on this pin. For further information, see the related application note.

(4)

A 100 µF electrolytic input capacitor is required for proper operation. The electrolytic capacitor must be rated for a minimum of 750 mA

rms of ripple current. An additional 10 µF ceramic capacitor is required for output voltages 3.3 V and higher. For further information, see

the related application information on capacitor selection.

(5)

An external output capacitor is not required for basic operation. Adding 100 µF of distributed capacitance at the load improves the

transient response.

(6)

This is the calculated maximum. The minimum ESR limitation oftens result in a lower value. When controlling the Track pin using a

(7)

This is the typical ESR for all the electrolytic (nonceramic) output capacitance. Use 7 m

Ω as the minimum when using max-ESR values

to calculate.

Copyright © 2003–2007, Texas Instruments Incorporated

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