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6-A, 12-V Input Non-Isolated

Wide-Output Adjust Power Module

SLTS202E– MAY 2003 – REVISED NOVENBER 2007

PTH12000W — 12-V Input

Electrical Specifications Unless otherwise stated, Ta =25 °C, Vin =12 V, Vo =3.3 V, C1 =100 μF, C2 =0 μF, C3 =0 μF, and Io =Iomax

PTH12000W

Characteristics

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Io

Over

ΔVadj range

Ta =60 °C, 200 LFM

0

—

6 (1)

A

Ta =25 °C, natural convection

0

—

6 (1)

Input Voltage Range

Vin

Over Io range

10.8

—

13.2

V

Set-Point Voltage Tolerance

Vo tol

—

—

±2 (2)

%Vo

Temperature Variation

ΔRegtemp

–40 °C <Ta < +85 °C

—

±0.5

—

%Vo

Line Regulation

ΔRegline

Over Vin range

—

±5

—

mV

Load Regulation

ΔRegload

Over Io range

—

±5

—

mV

Total Output Variation

ΔRegtot

Includes set-point, line, load,

——±3 (2)

%Vo

–40 °C

≤ Ta ≤ +85 °C

Ouput Voltage Adjust Range

ΔVadj

Over Vin range

1.2

—

5.5

V

Efficiency

η

Vin =12 V, Io =4 A

RSET = 280

Ω Vo = 5.0 V

—

92

—

RSET = 2.0 k

Ω Vo = 3.3 V

—

90

—

RSET = 4.32 kΩ Vo = 2.5 V

—

88

—

RSET = 8.06 k

Ω Vo = 2.0 V

—

87

—

%

RSET = 11.5 k

Ω Vo = 1.8 V

—

86

—

RSET = 24.3 k

Ω Vo = 1.5 V

—

84

—

RSET = open cct Vo

= 1.2 V

—

82

—

Vo Ripple (pk-pk)

Vr

20 MHz bandwidth, Io =4 A

Vo

≥ 3.3 V

—

50 (3)

—

mVpp

C3 =10 μF ceramic

Vo

≤ 2.5 V

—

25 (3)

—

Transient Response

1 A/μs load step, 50 to 100 % Iomax,

Vo =1.8 V, C2 =100 μF

ttr

Recovery time

—

70

—

μSec

ΔVtr

Vo over/undershoot

—

100

—

mV

Over-Current Threshold

Io trip

Reset followed by auto-recovery

—

12

—

A

Under-Voltage Lockout

UVLO

Vin increasing

—

—

10.4

V

Vin decreasing

8.8

—

—

Inhibit Control (pin 3)

Referenced to GND

Input High Voltage

VIH

Vin –0.5

—

Open (4)

V

Input Low Voltage

VIL

–0.2

—

0.5

Input Low Current

IIL

Pin 3 to GND

—

–240

—

μA

Standby Input Current

Iin standby

pins 1 & 3 connected

—

1

—

mA

Switching Frequency

ƒs

Over Vin and Io ranges

300

350

400

kHz

External Input Capacitance

Cin

100 (5)

——μF

External Output Capacitance

Cout

Capacitance value

non-ceramic

0

100 (6)

3,300 (7)

μF

ceramic

0

—

300

Equiv. series resistance (non-ceramic)

4

(8)

——m

Ω

Reliability

MTBF

Per Bellcore TR-332

9.4

—

—

106 Hrs

50 % stress, Ta =40 °C, ground benign

Notes: (1) See SOA curves or consult factory for appropriate derating.

(2) The set-point voltage tolerance is affected by the tolerance and stability ofRSET. The stated limit is unconditionally met if RSET has a tolerance of 1%

with 100 ppm/°C or better temperature stability.

(3) The pk-pk output ripple voltage is measured with an external 10 μF ceramic capacitor. See the standard application schematic.

(4) The Inhibit control (pin 3) has an internal pull-up to Vin, and if left open-circuit the module will operate when input power is applied. A small low-

leakage (<100 nA) MOSFET is recommended to control this input. See application notes for more information.

(5) The regulator requires a minimum of 100 μF input capacitor with a minimum 750 mArms ripple current rating. For further information, consult the

related application note on Capacitor Recommendations.

(6) An external output capacitor is not required for basic operation. Adding 100 μF of distributed capacitance at the load will improve the transient response.

(7) This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the application notes for further guidance.

(8) This is the typical ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m

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