PTH08T240FAS datasheet(4/37 Pages) TI

Part #	PTH08T240FAS

Description	10-A, 4.5-V to 14-V INPUT, NON-ISOLATED POWER MODULE FOR 3-GHz DSP SYSTEMS

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Manufacturer	TI [Texas Instruments]

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ELECTRICAL CHARACTERISTICS

PTH08T240F

SLTS277C – DECEMBER 2006 – REVISED DECEMBER 2008........................................................................................................................................ www.ti.com

PTH08T240F

TA = 25°C, VI = 5 V, VO = 1.0 V, CI = 220 µF, CO = 1000 µF, and IO = IO max (unless otherwise stated)

PARAMETER

TEST CONDITIONS

PTH08T240F

UNIT

MIN

TYP

MAX

IO

Output current

Over VO range

25°C, natural convection

0

10

A

0.69V

≤ VO < 1.3V

4.5

14 (1)

VI

Input voltage range

Over IO range

V

1.3V

≤ VO ≤ 2.0

4.5

14

VOADJ

Output voltage adjust range

Over IO range

0.69

2.0

V

Set-point voltage tolerance

±0.5

±1 (2)

%VO

Temperature variation

–40°C < TA < 85°C

±0.3

%VO

VO

Line regulaltion

Over VI range

±3

mV

Load regulation

Over IO range

±2

mV

Total output variation

Includes set-point, line, load, –40°C

≤ TA ≤ 85°C

±1.5 (2)

%VO

RSET = 4.78 kΩ, VO = 1.8 V

90%

RSET = 7.09 kΩ, VO = 1.5 V

88%

η

Efficiency

IO = 10 A

RSET = 12.1 kΩ, VO = 1.2 V

87%

RSET = 20.8 kΩ, VO = 1.0 V

85%

VO Ripple (peak-to-peak)

20-MHz bandwidth

10 (1)

mVPP

ILIM

Overcurrent threshold

Reset, followed by auto-recovery

20

A

ttr

Recovery time

500

µs

CO = 1000 µF, Type C

RTT=open

2.5 A/µs load step

ΔVtr

VO over/undershoot

25

mV

Transient response

0.5 A to 3.5 A step

ttrTT

Recovery time

800

µs

VO = 0.9 V

CO = 2000 µF, Type C

RTT=24.3＝kΩ

ΔVtrTT

VO over/undershoot

14

mV

IIL

Track input current (pin 10)

Pin to GND

–130(3)

µA

dVtrack/dt

Track slew rate capability

CO ≤ CO (max)

1

V/ms

VI increasing, RUVLO = OPEN

4.3

4.45

Adjustable Under-voltage lockout

UVLOADJ

VI decreasing, RUVLO = OPEN

3.7

4.2

V

(pin 11)

Hysteresis, RUVLO ≤ 52.3 kΩ

0.5

Input high voltage (VIH)

Open(4)

V

Inhibit control (pin 11)

Input low voltage (VIL)

-0.2

0.8

Input low current (IIL), Pin 11 to GND

-235

µA

Iin

Input standby current

Inhibit (pin 11) to GND, Track (pin 10) open

5

mA

f s

Switching frequency

Over VI and IO ranges, SmartSync (pin 1) to GND

260

300

340

kHz

fSYNC

Synchronization frequency

240

400

kHz

VSYNCH

SYNC High-Level Input Voltage

2

5.5

V

VSYNCL

SYNC Low-Level Input Voltage

0.8

V

tSYNC

SYNC Minimum Pulse Width

200

nSec

Nonceramic

220 (5)

CI

External input capacitance

µF

Ceramic

22 (5)

Capacitance Value

Nonceramic

1000 (6)

10000

µF

CO

External output capacitance

Capacitance × ESR product (CO × ESR)

1000

10000

µF×m

Ω

MTBF

Reliability

Telcordia SR-332, 50% stress, TA= 40°C, ground benign

6.1

106 Hr

(1)

For output voltages less than 1.3 V, the ripple may increase (up to 2×) when operating at input voltages greater than (VO × 11). See the

SmartSync section and the TurboTrans section of the datasheet for additional information.

(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 low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 10. The

open-circuit voltage is less than 8 Vdc.

(4)

This control pin has an internal pull-up. Do not place an external pull-up on this pin. If it is left open-circuit, the module operates when

input power is applied. A small, low-leakage (<100 nA) MOSFET is recommended for control. For additional information, see the related

application information section.

(5)

A 220 µF electrolytic input capacitor is required for proper operation. The electrolytic capacitor must be rated for a minimum of 500 mA

rms of ripple current. An additional 22-µF ceramic input capacitor is recommended to reduce rms ripple current.

(6)

1000 µF of external low-ESR output capacitance is required for basic operation. See the Capacitor Recommendation section and

TurboTrans Application Information section for more guidance.

4

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