Dual Output Low-Dropout Voltage Regulator

TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

POST OFFICE BOX 655303

•

DALLAS, TEXAS 75265

Dual Output Voltages for Split-Supply

Applications

3.3-V/Adjustable Output, 3.3 V/1.8 V, and

3.3 V/2.5

Dropout Voltage < 80 mV Max at

= 100 mA (3.3-V option)

Low Quiescent Current, Independent of

Load . . . 340

A Typ Per Regulator

Ultra-Low-Current Sleep State . . . 2

A Max

Dual Active-Low Reset Signals with 200-ms

Pulse Width

Output Current Range of 0 mA to 750 mA

Per Regulator

28-Pin PowerPAD

™

TSSOP Package

description

The TPS73HD3xx family of dual voltage regulators offers very low dropout voltages and dual outputs in a

compact package. Designed primarily for DSP applications, these devices can be used in any mixed-output

voltage application with each regulator supporting up to 750 mA. Output current can be allocated as desired

between the two regulators and used to power many of todays DSPs. Low quiescent current and very low

dropout voltage assure maximum power usage in battery-powered applications. Texas Instruments PowerPAD

TSSOP package allows use of these devices with any voltage/current combination within the range of the listed

specifications without thermal problems, provided proper device mounting procedures are followed. Separate

inputs allow the designer to configure the source power as desired. Dual active-low reset signals allow resetting

of core-logic and I/O separately. Remote sense/feedback terminals provide regulation at the load. The

TPS73HD3xx are available in 28-pin PowerPAD TSSOP. They operate over a free-air temperature range of

–40

C to 125

AVAILABLE OPTIONS

REGULATOR 1

VO (V)

REGULATOR 2

VO (V)

TSSOP

(PWP)

Adj (1.2 – 9.75 V)

3.3 V

TPS73HD301PWPR

– 40

C to 125

1.8 V

3.3 V

TPS73HD318PWPR

2.5 V

3.3 V

TPS73HD325PWPR

1999, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments Incorporated.

1GND

1EN

1IN

2GND

2EN

2IN

1RESET

1FB/SENSE

1OUT

2RESET

2SENSE

2OUT

PWP PACKAGE

(TOP VIEW)

NC – No internal connection

TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

POST OFFICE BOX 655303

•

DALLAS, TEXAS 75265

functional block diagram

† Switch positions shown with EN low (active).

–

Delayed

Reset

Vref = 1.182 V

†

GND

OUT

RESET

SENSE/FB

OUTPUT VOLTAGE

UNIT

Adjustable

∞

Ω

1.8 V

122

233

Ω

2.5 V

260

233

Ω

3.3 V

420

233

Ω

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

1, 2, 7, 8,

13–16, 20,

21, 26, 27

No connection

1GND

Regulator #1 ground

1EN

Regulator #1 enable, low = enable

1IN

5, 6

Regulator #1 input supply voltage

2GND

Regulator #2 ground

2EN

Regulator #2 enable, low = enable

2IN

11, 12

Regulator #2 input supply voltage

2OUT

17, 18

Regulator #2 output voltage

2SENSE

Regulator #2 output voltage sense (fixed output)

2RESET

Regulator #2 reset signal, low = reset

1OUT

23, 24

Regulator #1 output voltage

1FB/SENSE

Regulator #1 output voltage feedback (adjustable output)

1RESET

Regulator #1 reset signal, low = reset

TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

POST OFFICE BOX 655303

•

DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

†

Input voltage range, V

(xIN, xRESET, xSENSE, xEN)

–0.3 V to 11 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Differential input voltage,V

(1GND to 2GND)

2 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output current, I

(1OUT, 2OUT)

2 A

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation

See Dissipation Rating Tables

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

– 40

C to 125

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

– 65

C to 150

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds

260

. . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltages are with respect to GND.

DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERATURES‡

PACKAGE

AIR FLOW

(CFM)

TA < 25

POWER RATING

DERATING FACTOR

ABOVE TA = 25

TA = 70

POWER RATING

TA = 85

POWER RATING

PWP‡

2.9 W

23.5 mW/

1.9 W

1.5 W

PWP‡

300

4.3 W

34.6 mW/

2.8 W

2.2 W

PWP§

3 W

23.8 mW/

1.9 W

1.5 W

PWP§

300

7.2 W

57.9 mW/

4.6 W

3.8 W

‡ This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in

5-in PCB, 1 oz. copper,

2-in

2-in coverage (4 in2).

§ This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in

2-in PCB, 1 oz. copper

with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in2) and layers 3 and 6 at 100% coverage (6 in2).

recommended operating conditions

MIN

MAX

UNIT

Input voltage, VI†

Adjustable output (regulator #1)

2.97

Input voltage, VI†

3.3–V output (regulator #2)

3.97

High-level input voltage at EN, VIH

Low-level input voltage at EN, VIL

0.5

Total output current range (per regulator), IO

750

Operating virtual junction temperature range, TJ

– 40

125

† Minimum input voltage defined in the recommended operating conditions is the maximum specified output voltage plus dropout voltage, VDO,

at the maximum specified load range (750 mA). Since dropout voltage is a function of output current, the usable range can be extended for lighter

loads. To calculate the minimum input voltage for the maximum load current used in a given application, use the following equation:

I(min)

O(max)

)

DO(max load)

Because regulator 1 of the TPS373HD301 is programmable, rDS(on) should be used to calculate VDO before applying the above equation. The

equation for calculating VDO from rDS(on) is given in Note 3 in the TPS73HD301 electrical characteristics table. The minimum value of 3.5 V is

the absolute lower limit for the recommended input voltage range for the TPS73HD301. With 2.97-V input voltage, the LDO may be in dropout

and will not meet the 3% regulaotr output or 750-mA load current specification.

TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

POST OFFICE BOX 655303

•

DALLAS, TEXAS 75265

electrical characteristics, V

I(IN)

= 4.3 V, I

= 10 mA, EN = 0 V, C

= 4.7

F/CSR

‡

= 1

Ω

SENSE/FB shorted to OUT (unless otherwise noted)

PARAMETER

TEST CONDITIONS§

MIN

TYP

MAX

UNIT

Quiescent current (active mode) each regulator

≤

0.5 V,

0 mA

≤

750 mA

340

415

Quiescent current (active mode), each regulator

0 mA

≤

750 mA,

See NOTE 2

–40

C to 125

550

ICC

Supply current (standby mode) each regulator

EN = VI,

0.01

0.5

ICC

Supply current (standby mode), each regulator

NOTE 2

–40

C to 125

Output current limit each regulator

VO = 0

VI = 10 V

0.8

1.2

Output current limit, each regulator

VO = 0, VI = 10 V

–40

C to 125

Ilk

Pass element leakage current (standby mode)

EN = VI,

0.01

0.5

Ilkg

Pass-element leakage current (standby mode)

See NOTE 2

–40

C to 125

Output voltage temperature coefficient

–40

C to 125

ppm/

Thermal shutdown junction temperature

165

Logic high (EN) (standby mode)

2.5 V

≤

6 V,

C to 125

Logic high (EN) (standby mode)

6 V

≤

10 V

–40

C to 125

2.7

Logic low (EN) (active mode)

See NOTE 2

0.5

Logic low (EN) (active mode)

See NOTE 2

–40

C to 125

0.5

Vhys

Hysteresis voltage (EN)

Input current (EN)

0 V

≤

10 V

–0.5

0.001

0.5

Input current (EN)

0 V

≤

10 V

–40

C to 125

–0.5

0.5

Minimum input voltage for active pass element

2.05

2.5

Minimum input voltage, for active pass element

–40

C to 125

2.5

Minimum input voltage for valid RESET

IO(RESET) = 300

1.5

Minimum input voltage, for valid RESET

IO(RESET) = –300

–40

C to 125

1.9

‡ 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 CO.

§ 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.

NOTE 2: Minimum input voltage is 3.5V or Vo(typ) + 1V whichever is greater.

The minimum value of 3.5 V is the absolute lower limit for the recommended input voltage range for the TPS73HD301.

TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

POST OFFICE BOX 655303

•

DALLAS, TEXAS 75265

electrical characteristics, V

I(IN)

= 4.3 V, I

= 10 mA, EN = 0 V, C

= 4.7

F/CSR

†

= 1

Ω

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

adjustable regulator

PARAMETER

TEST CONDITIONS‡

MIN

TYP

MAX

UNIT

Reference voltage (1FB)

5 mA

≤

750 mA,

1.182

Reference voltage (1FB)

See NOTE 2

–40

C to 125

1.147

1.217

Reference voltage temperature coef-

ficient

–40

C to 125

ppm/

≤

750 mA,

0.52

Pass-element series resistance (see

See NOTE 2

–40

C to 125

Ω

(

Note 3)

VI = 3.9 V, 50

≤

750 mA

0.32

Ω

VI = 5.9 V, 50

≤

750 mA

0.23

Input regulation

VI = 3.5 V, 50

≤

750 mA

Output regulation

IO = 5 mA to 750 mA,

See NOTE 2

Output regulation

IO = 50

A to 750 mA,

See NOTE 2

Ripple rejection

f = 120 Hz,

IO = 50

Ripple rejection

f = 120 Hz,

IO = 500 mA

Output noise-spectral density

f = 120 Hz

mV/

√

10 H

≤

100 kH

CL = 4.7

Output noise voltage

10 Hz

≤

100 kHz,

CSR = 1

Ω

CL = 10

V/rms

CSR = 1

Ω

CL = 100

V(TO) Trip-threshold voltage (RESET)§

VO(FB) decreasing

–40

C to 125

1.101

1.145

Vhys

Hysteresis voltage (RESET)§

Measured at VO(ER)

VOL

Low level output voltage (RESET)§

VI = 2 13 V

IO(RESET) = 400

0.1

0.4

VOL

Low-level output voltage (RESET)§

VI = 2.13 V, IO(RESET) = 400

–40

C to 125

0.4

Input current (1FB)

–10

0.1

Input current (1FB)

–40

C to 125

–20

† 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:

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.

TPS73HD301, TPS73HD318, TPS73HD325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999

POST OFFICE BOX 655303

•

DALLAS, TEXAS 75265

electrical characteristics, V

I(IN)

= 4.3 V, I

= 10 mA, EN = 0 V, C

= 4.7

F/CSR

†

= 1

Ω

, SENSE/FB

shorted to OUT (unless otherwise noted) (continued)

1.8-V regulator (TPS73HD318)

PARAMETER

TEST CONDITIONS‡

MIN

TYP

MAX

UNIT

Output voltage

4 3 V

≤

10 V

1.746

1.8

1.854

Output voltage

4.3 V

≤

10 V

–40

C to 125

1.728

1.872

Pass-element series

(3.5 V – VO)/IO,

VI = 3.5 V,

0.5

Ω

resistance

(

O) O,

IO = 750 mA,

V2SENSE = 0 V§

–40

C to 125

1.2

Ω

Input regulation

≤

750 mA, See NOTE 2

Output regulation

IO = 5 mA to 750 mA, See NOTE 2

Output regulation

IO = 50

A to 750 mA, See NOTE 2

Ripple rejection

f = 120 Hz,

IO = 50

Ripple rejection

f = 120 Hz,

IO = 500 mA

Output noise-spectral density

f = 120 Hz

mV/

√

10 H

≤

100 kH

CL = 4.7

274

Output noise voltage

10 Hz

≤

100 kHz,

CSR = 1

Ω

CL = 10

228

V/rms

CSR = 1

Ω

CL = 100

159

† 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.

§ Pass-element series resistance measured with sense pin disconnected from output to allow output voltge to rise to full saturation.