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ELECTRICAL CHARACTERISTICS

PTV12020W/L

SLTS231A – NOVEMBER 2004 – REVISED FEBRUARY 2005

operating at 25

°C free-air temperature, V

otherwise noted)

PTV12020L

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

Output current

Natural convection airflow

0

A

Input voltage range

10.8

13.2

V

Set-point voltage tolerance

Temperature variation

–40

°C <T

±0.5%

Line regulation

±10

mV

Load regulation

±12

mV

Total output variation

Includes set-point, line, load, –40

°C ≤ T

Adjust range

0.8

1.8

V

87%

85%

η

Efficiency

83%

80%

77%

Output voltage ripple (pk-pk)

20-MHz bandwidth

2

Overcurrent threshold

Reset, followed by auto-recovery

30

A

Transient response

Recovery time

70

µs

100

mV

Pin to GND

–0.13

mA

Track control (pin 9)

Control slew-rate limit

C3

≤ C3 (max)

1

V/ms

2

Referenced to GND

V

Inhibit control (pin 12)

–0.2

0.6

Pin to GND

–0.24

mA

Input standby current

Inhibit (pin 12) to GND, Track (pin 9) open

10

mA

9.5

10.4

UVLO

Undervoltage lockout

V

8.8

9

ƒ

S

Switching frequency

200

250

300

kHz

Nonceramic (C1)

External input capacitance

µF

Ceramic (C2)

Nonceramic

0

Capacitance value

µF

External output capacitance (C3)

Ceramic

0

300

Equivalent series resistance (nonceramic)

m

Ω

MTBF

Reliability

4.9

(1)

See thermal derating curves for safe operating area (SOA), or consult factory for appropriate derating.

(2)

tolerance of 1%, with 100 ppm/

°C or better temperature stability.

(3)

This control pin is pulled up to an internal supply voltage. To avoid risk of damage to the module, do not apply an external voltage

greater than 7 V. If this input is left open-circuit, the module operates when input power is applied. A small low-leakage (<100 nA)

MOSFET is recommended for control. For further information, consult the related application note.

(4)

A 22-µF high-frequency ceramic capacitor and 560-µF electrolytic input capacitor are required for proper operation. The electrolytic

capacitor must be rated for the minimum ripple current rating. Consult the Application Information for guidance on input capacitor

selection.

(5)

An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load improves the

transient response.

(6)

This is the calculated maximum. The minimum ESR limitation often results in a lower value. Consult the Application Informaiton for

further guidance.

(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.

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