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ELECTRICAL CHARACTERISTICS

PTH12010W, PTH12010L

SLTS205G – JUNE 2003 – REVISED FEBRUARY 2007

T

A = 25°C, VI = 12 V, VO = 3.3 V, CI = 560 µF, CO = 0 µF, and IO = IO max (Unless otherwise stated)

PTH12010W

CHARACTERISTICS

CONDITIONS

MIN

TYP

MAX

UNIT

60

°C, 200 LFM airflow

0

12(1)

Io

Output current

1.2 V

≤ V

o≤ 5.5 V

A

25

°C, natural convection

0

12(1)

VI

Input voltage range

Over Io range

10.8

13.2

V

Vo tol

Set-point voltage tolerance

±2(2)

%Vo

∆Regtemp Temperature variation

–40 °C < TA < 85 °C

±0.5

%Vo

∆Regline

Line regulation

Over VI range

±10

mV

∆Regload

Load regulation

Over Io range

±12

mV

∆Regtot

Total output variation

Includes set-point, line, load, –40°C

≤ T

A ≤ 85°C

±3(2)

%Vo

∆Vadj

Output voltage adjust range

Over VI range

1.2

5.5

V

RSET = 280 Ω, Vo = 5V

94

RSET = 2.0 kΩ, Vo = 3.3V

93

RSET = 4.32 kΩ, Vo = 2.5V

91

η

Efficiency

IO = 8 A

%

RSET = 11.5 kΩ, Vo = 1.8V

89

RSET = 24.3 kΩ, Vo = 1.5V

88

RSET = OPEN, Vo = 1.2V

86

Vr

VO ripple (peak-to-peak)

20-MHz bandwidth

All Vo

1

% VO

Io trip

Overcurrent threshold

Reset, followed by auto-recovery

20

A

ttr

1 A/µs load step,

Recovery Time

70

µSec

Transient response

50 to 100% Iomax,

Vo over/undershoot

100

mV

∆Vtr

CO= 330 µF

VOmargin

Margin up/down adjust

±5

%

Margin Control

(pins 9 &10)

IILmargin

Margin input current, Pin to GND

–8(3)

µA

IILtrack

Track input current (pin 8)

Pin to GND

–0.13(4)

mA

dVtrack/dt Track slew rate capability

CO≤ CO(max)

1

V/ms

VI increasing

9.5

10.4

UVLO

Undervoltage lockout

V

VI decreasing

8.8

9

VIH

Input high voltage, Referenced to GND

Open(4)

V

VIL

Inhibit control (pin 3)

Input low voltage, Referenced to GND

–0.2

0.5

IIL

Input low current, Pin 3 to GND

0.24

mA

II

Input standby current

Inhibit (pin 3) to GND, Track (pin 8) open

10

mA

fs

Switching frequency

Over VI and Io ranges

300

350

400

kHz

CI

External input capacitance

560(5)

µF

nonceramic

0(6)

330(7)

6,600(8)

Capacitance value

µF

CO

External output capacitance

ceramic

0

300

Equivalent series resistance (nonceramic)

4(9)

m

Ω

MTBF

Reliability

Bellcore TR-332,50% stress,TA=40°C, GND benign

6.4

106 Hr

(1)

See SOA curves or consult factory for appropriate derating.

(2)

The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a

tolerance of 1%, with 100 ppm/

°C (or better) temperature stability.

(3)

A small, low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc.

(4)

This control pin has an internal pull-up to the input voltage VI (7.5 V for pin 8). If it is left open-circuit the module operates when input

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 section.

(5)

A 560

µF electrolytic input capacitor, rated for a minimum of 800 mA rms of ripple current is required for proper operation.

(6)

When operating at an output voltage

≥ 3.3 V, 47-µF of external output capacitance is required for proper operation.

(7)

External output capacitance is not required for operation. Adding 330

µF of distributed capacitance improves the transient response.

(8)

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

voltage supervisor, CO(max) is reduced to 3300 µF. See the application notes for further guidance.

(9)

This is the typical ESR for all nonceramic ouput capacitance. Use 7 m

Ω as the minimum when using max-ESR values to calculate.

3

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