TEXAS INSTRUMENTS REG103 Technical data

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REG103

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SBVS010B – JANUARY 2000 – REVISED FEBRUARY 2004

DMOS

500mA Low-Dropout Regulator

REG103

FEATURES

● NEW DMOS TOPOLOGY:

Ultra Low Dropout Voltage:

115mV Typ at 500mA and 3.3V Output

Output Capacitor NOT Required for Stability

● FAST TRANSIENT RESPONSE

●

VERY LOW NOISE:

33µVrms

● HIGH ACCURACY: ±2% max

● HIGH EFFICIENCY:

I

= 1mA at I

GND

Not Enabled: I

= 500mA

OUT

= 0.5µA

GND

● 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE

OUTPUT VERSIONS

● FOLDBACK CURRENT LIMIT

● THERMAL PROTECTION

● OUTPUT VOLTAGE ERROR INDICATOR

(1)

● SMALL SURFACE-MOUNT PACKAGES:

SOT223-5, DDPAK-5, SO-8

APPLICATIONS

● PORTABLE COMMUNICATION DEVICES

● BATTERY-POWERED EQUIPMENT

● PERSONAL DIGITAL ASSISTANTS

● MODEMS

● BAR-CODE SCANNERS

● BACKUP POWER SUPPLIES

DESCRIPTION

The REG103 is a family of low-noise, low-dropout, linear
regulators with low ground pin current. Its new DMOS
topology provides significant improvement over previous
designs, including low-dropout voltage (only 115mV typ at
full load), and better transient performance. In addition, no
output capacitor is required for stability, unlike conventional
low-dropout regulators that are difficult to compensate and
require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1mA (at I
and drops to 0.5µA in not enabled mode. Unlike regulators
with PNP pass devices, quiescent current remains relatively
constant over load variations and under dropout conditions.

The REG103 has very low output noise (typically 33µVrms
for V

= 3.3V with CNR = 0.01µF), making it ideal for use

OUT

in portable communications equipment. On-chip trimming
results in high output voltage accuracy. Accuracy is main­tained over temperature, line, and load variations. Key
parameters are tested over the specified temperature range
(–40°C to +85°C).

The SO-8 version of the REG103 has an ERROR pin that
provides a power good flag, indicating the regulator is in
regulation. The REG103 is well protected—internal cir­cuitry provides a current limit that protects the load from
damage. Thermal protection circuitry keeps the chip from
being damaged by excessive temperature. In addition to the
SO-8 package, the REG103 is also available in the DDPAK
and the SOT223-5.

= 500mA)

OUT

ENABLE

V

IN

+

0.1µF

NR

NR = Noise Reduction

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.

All trademarks are the property of their respective owners.

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.

REG103

(Fixed Voltage

Versions)

Gnd

(1)

ERROR

+

NOTE: (1) SO-8 Package Only. (2) Optional.

1)

ENABLE

V

OUT

(2)

C

OUT

V

IN

www.ti.com

+

0.1µF

REG103-A

Gnd

Copyright © 2000-2004, Texas Instruments Incorporated

ERROR

R
Adj
R

V

OUT

+

1

2

(2)

C

OUT

ABSOLUTE MAXIMUM RATINGS

Supply Input Voltage, VIN.......................................................–0.3V to 16V

Enable Input ............................................................................ –0.3V to V

Error Flag Output .....................................................................–0.3V to 6V

Error Flag Current ...............................................................................2mA

Output Short-Circuit Duration ......................................................Indefinite

Operating Temperature Range ....................................... –55°C to +125°C

Storage Temperature Range .......................................... –65°C to +150°C

Junction Temperature ..................................................... –55°C to +150°C

Lead Temperature

NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.

(soldering, 3s, SO-8, SOT, and DDPAK)

(1)

IN

............... +240°C

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper han­dling and installation procedures can cause damage.

ESD damage can range from subtle performance degrada­tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.

PACKAGE/ORDERING INFORMATION

PRODUCT PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER MEDIA, QUANTITY
5V Output

REG103FA-5 DDPAK-5 KTT –40°C to +85°C REG103FA-5.0 REG103FA-5KTTT Tape and Reel, 50

(1)

SPECIFIED

PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT

"""""REG103FA-5/500 Tape and Reel, 500

REG103UA-5 SO-8 D –40°C to +85°C REG103U50 REG103UA-5 Rails, 100

"""""REG103UA-5/2K5 Tape and Reel, 2500

REG103GA-5 SOT223-5 DCQ –40°C to +85°C R103G50 REG103GA-5 Rails, 78

"""""REG103GA-5/2K5 Tape and Reel, 2500

3.3V Output

REG103FA-3.3 DDPAK-5 KTT –40°C to +85°C REG103FA-3.3 REG103FA-3.3KTTT Tape and Reel, 50

"""""REG103FA-3.3/500 Tape and Reel, 500

REG103UA-3.3 SO-8 D –40°C to +85°C REG103UA4 REG103UA-3.3 Rails, 100

"""""REG103UA-3.3/2K5 Tape and Reel, 2500

REG103GA-3.3 SOT223-5 DCQ –40°C to +85°C R103G33 REG103GA-3.3 Rails, 78

"""""REG103GA-3.3/2K5 Tape and Reel, 2500

3.0V Output

REG103FA-3 DDPAK-5 KTT –40°C to +85°C REG103FA-3.0 REG103FA-3KTTT Tape and Reel, 50

"""""REG103FA-3/500 Tape and Reel, 500

REG103UA-3 SO-8 D –40°C to +85°C REG103U30 REG103UA-3 Rails, 100

"""""REG103UA-3/2K5 Tape and Reel, 2500

REG103GA-3 SOT223-5 DCQ –40°C to +85°C R103G30 REG103GA-3 Rails, 78

"""""REG103GA-3/2K5 Tape and Reel, 2500

2.7V Output

REG103FA-2.7 DDPAK-5 KTT –40°C to +85°C REG103FA-2.7 REG103FA-2.7KTTT Tape and Reel, 50

"""""REG103FA-2.7/500 Tape and Reel, 500

REG103UA-2.7 SO-8 D –40°C to +85°C REG103U27 REG103UA-2.7 Rails, 100

"""""REG103UA-2.7/2K5 Tape and Reel, 2500

REG103GA-2.7 SOT223-5 DCQ –40°C to +85°C R103G27 REG103GA-2.7 Rails, 78

"""""REG103GA-2.7/2K5 Tape and Reel, 2500

2.5V Output

REG103FA-2.5 DDPAK-5 KTT –40°C to +85°C REG103FA-2.5 REG103FA-2.5KTTT Tape and Reel, 50

"""""REG103FA-2.5/500 Tape and Reel, 500

REG103UA-2.5 SO-8 D –40°C to +85°C REG103U25 REG103UA-2.5 Rails, 100

"""""REG103UA-2.5/2K5 Tape and Reel, 2500

REG103GA-2.5 SOT223-5 DCQ –40°C to +85°C R103G25 REG103GA-2.5 Rails, 78

"""""REG103GA-2.5/2K5 Tape and Reel, 2500

Adjustable Output

REG103FA-A DDPAK-5 KTT –40°C to +85°C REG103FA-A REG103FA-AKTTT Tape and Reel, 50

"""""REG103FA-A/500 Tape and Reel, 500

REG103UA-A SO-8 D –40°C to +85°C REG103UA REG103UA-A Rails, 100

"""""REG103UA-A/2K5 Tape and Reel, 2500

REG103GA-A SOT223-5 DCQ –40°C to +85°C R103GA REG103GA-A Rails, 78

"""""REG103GA-A/2K5 Tape and Reel, 2500

NOTE: (1) For the most current package and ordering information, refer to our web site at www.ti.com.

2

REG103

SBVS010B

ELECTRICAL CHARACTERISTICS

Boldface limits apply over the specified temperature range, TJ = –40°C to +85°C.

At TJ = +25°C, VIN = V

OUT

+ 1V (V

= 3.0V for REG103-A), V

OUT

ENABLE

= 2V, I

= 10mA, CNR = 0.01µF, and C

OUT

OUT

REG103GA, UA, FA
PARAMETER CONDITION MIN TYP MAX UNITS
OUTPUT VOLTAGE

Output Voltage Range V

REG103-2.5 2.5 V

OUT

REG103-2.7 2.7 V
REG103-3.0 3.0 V
REG103-3.3 3.3 V
REG103-5 5V
REG103-A V

Reference Voltage V
Adjust Pin Current I

Accuracy ±0.5 ±2%

= –40°C to +85°C ±2.8 %

T

J

vs Temperature dV

vs Line and Load

T

= –40°C to +85°CV

J

DC DROPOUT VOLTAGE

(2, 3)

For all models except 5V I
For 5V model I

For all models except 5V I

T

= –40°C to +85°C

J

For 5V models I

T

= –40°C to +85°C

J

REF

ADJ

/dT TJ = –40°C to +85°C70ppm/°C

OUT

V

DROP

I

= 10mA to 500mA, VIN = (V

OUT

= (V

IN

OUT

I

OUT

OUT

= 500mA 160 250 mV

OUT

OUT

OUT

+ 0.7V) to 15V

OUT

+ 0.9V) to 15V ±3.5 %

= 10mA 3 25 mV

= 500mA 115 200 mV

= 500mA 230 mV
= 500mA 280 mV

REF

VOLTAGE NOISE

f = 10Hz to 100kHz V
Without CNR (all models) CNR = 0, C

(all fixed voltage models) CNR = 0.01µF, C

With C

NR

OUTPUT CURRENT

Current Limit

T

(4)

= –40°C to +85°C 500 1000 mA

J

n

I

CL

= 0 30µVrms/V • V

OUT

= 10µF10µVrms/V • V

OUT

550 700 950 mA

RIPPLE REJECTION

f = 120Hz 65 dB

ENABLE CONTROL

V

HIGH (output enabled) V

ENABLE

LOW (output disabled) –0.2 0.5 V

V

ENABLE

HIGH (output enabled) I

I

ENABLE

I

LOW (output disabled) V

ENABLE

Output Disable Time 50 µs

ENABLE

ENABLE

V

= 2V to VIN, VIN = 2.1V to 6.5

ENABLE

= 0V to 0.5V 2 100 nA

ENABLE

(5)

2V

Output Enable Soft Start Time 1.5 ms

ERROR FLAG

Current,
Voltage,

(6)

Logic HIGH (open drain)—Normal Operation
Logic LOW—On Error

VIN = V

= V

ERROR

Sinking 500µA 0.2 0.4 V

+ 1V 0.1 10 µA

OUT

THERMAL SHUTDOWN

Junction Temperature

Shutdown 150 °C
Reset from Shutdown 130 °C

GROUND PIN CURRENT

I

Ground Pin Current I

GND

ENABLE Pin LOW V

INPUT VOLTAGE V
Operating Input Voltage Range

(7)

IN

Specified Input Voltage Range V

T

= –40°C to +85°CV

J

= 10mA 0.5 0.7 mA

OUT

I

= 500mA 1 1.3 mA

OUT

≤ 0.5V 0.5 µA

ENABLE

2.1 15 V

> 2.7V V

IN

> 2.9V V

IN

+ 0.7 15 V

OUT

+ 0.9 15 V

OUT

TEMPERATURE RANGE

Specified Range T
Operating Range –55 +125 °C

J

–40 +85 °C

Storage Range –65 +150 °C
Thermal Resistance

DDPAK-5 Surface-Mount
SO-8 Surface-Mount
SOT223-5 Surface-Mount

θ

JC

θ

JA

θ

JC

Junction-to-Case 4 °C/W

Junction-to-Ambient 150 °C/W

Junction-to-Case 15 °C/W

NOTES: (1) The REG103 does not require a minimum output capacitor for stability. However, transient response can be improved with proper capacitor selection.
(2) Dropout voltage is defined as the input voltage minus the output voltage that produces a 2% change in the output voltage from the value at V
(3) Not applicable for V
(4) For V
REG103 no longer regulates when V

> 6.5V, see typical characteristic “V

IN

less than 1Ω at T

less than 2.7V. (4) Current limit is the output current that produces a 10% change in output voltage from VIN = V

OUT

< V

IN

= +25°C. See typical characteristic.

J

OUT

ENABLE

+ V

vs I

DROP (MAX)

.” (6) Logic low indicates out-of-regulation condition by approximately 10%, or thermal shutdown. (7) The

ENABLE

. In drop-out or when the input voltage is between 2.7V and 2.1V, the impedance from VIN to V

(1)

= 0.1µF

, unless otherwise noted.

5.5 V

1.295 V

0.2 1 µA

±0.5 ±2.5 %

OUT
OUT

IN

1 100 nA

= V

+ 1V at fixed load.

IN

OUT

+ 1V and I

OUT

µVrms
µVrms

OUT

is typically

OUT

V

= 10mA.

REG103

SBVS010B

3

PIN CONFIGURATIONS

Top View

DDPAK-5

1234

V

GND

O

(1)

NR/Adjust

5

V

IN

ENABLE

Tab is GND

V

V

NR/Adjust

GND

OUT

OUT

SO-8

1

2

(1)

3

4

8

7

6

5

V

IN

V

IN

ERROR

ENABLE

SOT223-5

Tab is GND

12345

ENABLE

GNDV

IN

V

OUT

NR/Adjust

(1)

(F Package)

(U Package)

NOTE: (1) For REG103A-A: voltage setting resistor pin.
All other models: noise reduction capacitor pin.

(G Package)

4

REG103

SBVS010B

TYPICAL CHARACTERISTICS

1000 200 300 400 500

180
160
140
120
100

80
60
40
20

0

DC Dropout Voltage (mV)

Output Current (mA)

DC DROPOUT VOLTAGE vs OUTPUT CURRENT

= –55°C
= +25°C
= +125°C

–75 –25–50 250 50 75 100 125

0.1

0.5

0

–0.5

–1

–1.5

Output Voltage Change (%)

Temperature (°C)

OUTPUT VOLTAGE vs TEMPERATURE

(Output Voltage % Change Referred to

I

OUT

= 10mA at +25°C)

= 10mA
= 100mA
= 500mA

For all models, at TJ = +25°C and V

= 2V, unless otherwise noted.

ENABLE

OUTPUT VOLTAGE CHANGE vs I

(V

= V

IN

OUT

Refered to I

0.5

0

–0.5

–1.0

Output Voltage Change (%)

–1.5

= –55°C
= +25°C
= +125°C

1000 200 300 400 500

OUTPUT VOLTAGE CHANGE vs V

(Output Voltage % Change Refered

to V

0.5

0

+ 1V, Output Voltage % Change

= 10mA at +25°C)

OUT

I

(mA)

OUT

= V

+ 1V at I

IN

OUT

OUT

= 10mA)

OUT

IN

–0.5

–1.0

Output Voltage Change (%)

–1.5

0246 108

Input Voltage Above V

DC DROPOUT VOLTAGE vs TEMPERATURE

160

120

80

40

DC Dropout Voltage (mV)

0

–75 –25–50 250 50 75 100 125

Temperature (°C)

REG103

SBVS010B

OUT

= 10mA
= 100mA
= 500mA

= 10mA
= 100mA
= 500mA

LINE REGULATION vs TEMPERATURE

(V

= V

+ 1V to VIN = 15V )

IN

0.5

OUT

0.4

0.3

0.2

0.1

Output Voltage Change (%)

0

–75 –25–50 250 50 75 100 125

Temperature (°C)

= 10mA
= 100mA

5

TYPICAL CHARACTERISTICS (Cont.)

For all models, at TJ = +25°C and V

= 2V, unless otherwise noted.

ENABLE

500mA

10mA

LOAD TRANSIENT RESPONSE

REG103-3.3

V

= 4.3V

IN

200mV/div200mV/div

LOAD TRANSIENT RESPONSE

REG103-Adj.

V

= 3.3V, VIN = 4.3V, CFB = 0.01µF

OUT

200mV/div200mV/div

LINE TRANSIENT RESPONSE

REG103-3.3

C

OUT

= 0

V

OUT

C

= 0

OUT

Load = 100mA

V

OUT

50mV/div50mV/div

C

OUT

= 10µF

V

OUT

I

OUT

6V

C

= 10µF

OUT

V

OUT

V

IN

5V

10µs/div

50µs/div

LINE TRANSIENT RESPONSE

REG103-Adj.

V

= 3.3V, CFB = 0.01µF, I

C

= 0

OUT

V

OUT

OUT

= 100mA

OUT

C

= 0

OUT

V

OUT

50mV/div50mV/div

C

OUT

500mA

10mA

10µs/div

LOAD REGULATION vs TEMPERATURE

0.5

IN

OUT

+ 1V and 10mA < I

< 500mA)

OUT

(V

= V

0.4

0.3

0.2

0.1

Output Voltage Change (%)

0

–75 –25–50 250 50 10075 125

Temperature (°C)

= 10µF

V

I

OUT

OUT

C

OUT

6V
5V

50µs/div

OUTPUT NOISE DENSITY

10

1

0.1

Noise Density (µV/√Hz)

CNR = 0
C

= 0

OUT

C

= 0.01µF

NR

C

= 10µF

OUT

0.01
10 100 1000 10000 100,000

Frequency (Hz)

= 10µF

V

OUT

V

IN

6

REG103

SBVS010B