PTH04T240FAST datasheet(4/35 Pages) TI

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ELECTRICAL CHARACTERISTICS

PTH04T240F

SLTS293A – DECEMBER 2008 – REVISED MARCH 2009 ............................................................................................................................................... www.ti.com

PTH04T240F

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

PTH04T240F

UNIT

MIN

TYP

MAX

Output current

Over VO range

25°C, natural convection

0.69

≤ VO ≤ 1.7

2.2

5.5

Input voltage range

Over IO range

1.7 < VO ≤ 2.0

VO+0.5

(1)

5.5

VOADJ

Output voltage adjust range

Over IO range

0.69

2.0

Set-point voltage tolerance

±0.5

±1 (2)

%Vo

Temperature variation

–40°C < TA < 85°C

±0.3

%Vo

Line regulaltion

Over VI range

±3

Load regulation

Over IO range

±2

Total output variation

Includes set-point, line, load, –40°C

≤ TA ≤ 85°C

±1.5 (2)

%Vo

RSET = 2.83 kΩ, VO = 2.0 V

91%

RSET = 4.78 kΩ, VO = 1.8 V

90%

RSET = 7.09 kΩ, VO = 1.5 V

88%

Efficiency

IO = 10 A

RSET = 12.1 kΩ, VO = 1.2 V

87%

RSET = 20.8 kΩ, VO = 1.0 V

85%

RSET = 689 kΩ, VO = 0.7 V

80%

VO Ripple (peak-to-peak)

20-MHz bandwidth

mVPP

ILIM

Overcurrent threshold

Reset, followed by auto-recovery

ttr

Recovery time

200

µs

CO = 1000 µF, TypeB

RTT = open

2.5 A/µs load step

ΔVtr

VO over/undershoot

Transient response

0.5 A to 3.5 A

ttrTT

Recovery time

300

µs

VO = 0.9 V

CO = 2000 µF, TypeB,

RTT = 23.7 kΩ

ΔVtrTT

VO over/undershoot

IIL

Track input current (pin 10)

Pin to GND

–130(3)

µA

dVtrack/dt

Track slew rate capability

CO ≤ CO (max)

V/ms

VI increasing, RUVLO = OPEN

1.95

Adjustable Under-voltage lockout

UVLOADJ

VI decreasing, RUVLO = OPEN

1.5

(pin 11)

Hysteresis, RUVLO = OPEN

0.5

Input high voltage (VIH)

Open(4)

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

f s

Switching frequency

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

300

kHz

Synchronization (SYNC)

fSYNC

240

400

kHz

frequency

VSYNCH

SYNC High-Level Input Voltage

5.5

VSYNCL

SYNC Low-Level Input Voltage

0.8

tSYNC

SYNC Minimum Pulse Width

200

Nonceramic

220 (5)

External input capacitance

µF

Ceramic

22 (5)

(1)

The minimum input voltage is 2.2 V or (VO + 0.5) V, whichever is greater.

(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 VI.

(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. The open-circuit voltage is less than

3.5Vdc. For additional information, see the related application information section.

(5)

A 220 µF input capacitor is required for proper operation. The input 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.

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