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ELECTRICAL CHARACTERISTICS

PTV05020W

SLTS232 – JANUARY 2005

operating at 25

°C free-air temperature, V

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output current

Natural convection airflow

0

A

Input voltage range

4.5

5.5

V

Set-point voltage tolerance

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

Adjust range

0.8

3.6

V

94%

93%

90%

η

Efficiency

89%

87%

85%

Output voltage ripple (pk-pk)

20-MHz bandwidth

20

Overcurrent threshold

Reset, followed by auto-recovery

35

A

Transient response

Recovery time

70

µs

120

mV

Pin to GND

–0.13

mA

Track control (pin 9)

Control slew-rate limit

C3

≤ C3 (max)

1

V/ms

4.3

4.5

UVLO

Undervoltage lockout

V

3.1

3.7

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

ƒ

S

Switching frequency

250

300

340

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

5

benign

(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)

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 680-µF electrolytic input capacitor are required for proper operation. The electrolytic

capacitor must be rated for 750 mArms minimum ripple current. Consult the Application Information for further guidance on 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 Information 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.

3