TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

5

POST OFFICE BOX 655303

SENSE/FB shorted to OUT (unless otherwise noted) (continued)

adjustable regulator

PARAMETER

TEST CONDITIONS‡

TJ

MIN

TYP

MAX

UNIT

Reference voltage (1FB)

5 mA

≤ IO ≤ 750 mA,

25

°C

1.182

V

Reference voltage (1FB)

O

,

See NOTE 2

–40

°C to 125°C

1.147

1.217

V

Reference voltage temperature coef-

ficient

–40

°C to 125°C

61

75

ppm/

°C

50

µA ≤ IO ≤ 750 mA,

25

°C

0.52

1

Pass-element series resistance (see

µ

O

,

See NOTE 2

–40

°C to 125°C

1

Ω

(

Note 3)

VI = 3.9 V,

50

µA ≤ IO ≤ 750 mA

25

°C

0.32

Ω

VI = 5.9 V,

50

µA ≤ IO ≤ 750 mA

25

°C

0.23

Input regulation

VI = 3.5 V,

50

µA ≤ IO ≤ 750 mA

25

°C

3

mV

Output regulation

IO = 5 mA to 750 mA,

See NOTE 2

25

°C

7

mV

Output regulation

IO = 50 µA to 750 mA,

See NOTE 2

25

°C

10

mV

Ripple rejection

f = 120 Hz,

IO = 50 µA

25

°C

59

dB

Ripple rejection

f = 120 Hz,

IO = 500 mA

25

°C

54

dB

Output noise-spectral density

f = 120 Hz

25

°C

2

mV/

√Hz

10 H

≤ f ≤ 100 kH

CL = 4.7 µF

25

°C

95

Output noise voltage

10 Hz

≤ f ≤ 100 kHz,

CSR = 1

Ω

CL = 10 µF

25

°C

89

µV/rms

CSR = 1

Ω

CL = 100 µF

25

°C

74

V(TO) Trip-threshold voltage (RESET)§

VO(FB) decreasing

–40

°C to 125°C

1.101

1.145

V

Vhys

Hysteresis voltage (RESET)§

Measured at VO(ER)

25

°C

12

mV

VOL

Low level output voltage (RESET)§

VI =2 13 V

IO(RESET) = 400 µA

25

°C

0.1

0.4

V

VOL

Low-level output voltage (RESET)§

VI = 2.13 V,

IO(RESET) = 400 µA

–40

°C to 125°C

0.4

V

II

Input current (1FB)

25

°C

–10

0.1

10

nA

II

Input current (1FB)

–40

°C to 125°C

–20

20

nA

† CSR (compensation series resistance) refers to the total series resistance, including the equivalent series resistance (ESR) of the capacitor,

any series resistance added externally, and PWB trace resistance to CL.

‡ Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must

be taken into account separately.

§ Output voltage programmed to 2.5 V with closed-loop configuration (see application information)

NOTE 3: To calculate dropout voltage, use equation:

V

DO +

I

O

r

DS(ON)

rDS(ON) is a function of both output current and input voltage. This parametric table lists rDS(ON) for VI = 3.9 V and 5.9 V, which corresponds to

dropout conditions for programmed output voltages of 4 V and 6 V respectively. For other programmed values, refer to Figure 29.