spx2954am3-l-5-0-tr Exar Corporation, spx2954am3-l-5-0-tr Datasheet

spx2954am3-l-5-0-tr

Manufacturer Part Number

spx2954am3-l-5-0-tr

Description

250ma Low Dropout Voltage Regulator

Manufacturer

Exar Corporation

Datasheet

1.SPX2954AM3-L-5-0-TR.pdf (17 pages)

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■ 5.0V and 3.3V Versions at 250mA

■ Accurate 0.5% for SPX2954A

■ Very Low Quiescent Current

■ Low Dropout: 310mV at 250mA

■ Extremely Tight Load and Line Regulation

■ Very Low Temperature Coefficient

■ Current and Thermal Limiting

■ Need only 1µF for Stability

■ Direct Replacement for LP2954

■ Offered in TO-92, TO-263, SOT-223, &

■ Error Flag Warns of Output Dropout

■ Logic-Controlled Electronic Shutdown

■ Programmable Output from 1.24V to 30V

Pin Connections

Date: 12/9/05

The SPX2954 and SPX2954A are low power voltage regulators. These devices are an excellent

choice for use in battery-powered applications such as cordless telephones, radio control

systems, and portable computers. The SPX2954 and SPX2954A feature low quiescent current

and low dropout voltage (typ. 20mV at 100µA and 310mV at 250mA). This includes a tight initial

tolerance (0.5% for SPX2954A), extremely good load and line regulation (0.05% typ.), and very

low output temperature coefficient (20 ppm/°C typ.), making the SPX2954/SPX2954A useful as

a low-power voltage reference.

The error flag output feature is used as a power-on reset for warning of a low output voltage, due

to a falling input voltage. The logic-compatible shutdown feature enables the regulator to be

switched ON and OFF. The SPX2954/SPX2954A is offered in 3-pin TO-92, TO-263, SOT-223

and TO-220 packages, and 8 pin SOIC package.

FEATURES

TO-220; also SOIC--8 Pin Versions Only

Output

TO-263-3 Package (T)

Top View

SPX2954

GND

250mA Low Dropout Voltage Regulator

OUT

Note:: Tab is internally connected to GND on T0-263, SOT-223, and TO-220-3.

TO-263-5 Package (T5)

Top View

SPX2954

SHUTDOWN

OUTPUT

4 5

SENSE

GND

8-Pin Surface Mount (S)

2) OUTPUT

GND

INPUT

SHUTDOWN

ERROR

Top View

SPX2954

SPX2954, 250mA Low Dropout Voltage Regulator

5V, 3.3V TAP

FEEDBACK

ERROR

INPUT

OUTPUT

Bottom View

TO-92 (N)

GND

ERROR

OUTPUT

INPUT

SHUTDOWN

INPUT

100K

______

ERROR

SOT-223 Package (M3)

Front View

SPX2954

GND

SPX2954

OUT

1.23V

SPX2954

OUT

REF

DESCRIPTION

TO-220-3 Package (U)

Front View

SPX2954

1.2 to 30V

GND

.01µF

OUT

3.3µF

TO-220-5 Package (U5)

Front View

1 2 3 4 5

SPX2954

2) OUTPUT

INPUT

GND

SHUTDOWN

ERROR

Related parts for spx2954am3-l-5-0-tr

spx2954am3-l-5-0-tr Summary of contents

Page 1

Low Dropout Voltage Regulator FEATURES ■ 5.0V and 3.3V Versions at 250mA Output ■ Accurate 0.5% for SPX2954A ■ Very Low Quiescent Current ■ Low Dropout: 310mV at 250mA ■ Extremely Tight Load and Line Regulation ■ Very ...

Page 2

ABSOLUTE MAXIMUM RATINGS Power Dissipation........................................Internally Limited Lead Temperature (soldering, 5 seconds) Storage Temperature Range........................-65°C to +150°C Operating Junction Temperature Range......-40°C to +125°C Input Supply Voltage...........................................-0.3V to +30V ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS 3.3 V Versions Output Voltage T =25°C J -25°C≤T ...

Page 3

ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER CONDITIONS Error Comparator Output Leakage Current V = 30V OH Output Low Voltage 400µA OL Upper Threshold Voltage (N OTE Lower Threshold Voltage (N OTE Hysteresis (N OTE Shutdown Input ...

Page 4

UNREGULATED DC + FROM 3 CMOS OR TTL SHUTDOWN SPX2954 Block Diagram, 8 Lead 5V Version TYPICAL PERFORMANCE CHARACTERISTICS 1.8 1.6 1.4 1.2 1.0 0.8 0.6 -75 -50 - 100 125 150 TEMPERATURE (ºC) Shutdown Threshold ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS =50kΩ =50kΩ INPUT VOLTAGE (VOLTS) Dropout Characteristics 320 280 240 I = 1mA L 200 160 ...

Page 6

TYPICAL PERFORMANCE CHARACTERISTICS 500 I = 150mA L 400 300 200 ~ ~ 100µ -75 -50 - 100 125 150 TEMPERATURE (ºC) Drop-Out Voltage OUT 6 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 2.3 2.1 1.9 1.7 -75 -50 - 100 125 150 TEMPERATURE Minimum Operating Voltage 250 200 150 100 1µF -100 OUT ~ ~ 100 ...

Page 8

APPLICATIONS HINTS EXTERNAL CAPACITORS The stability of the SPX2954 requires a 1µF or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electro- lytic works fine here. For operations below -25°C ...

Page 9

APPLICATIONS HINTS ( CONT upper limit of 1.2MΩ on value presented the I produces an error of typically which may be eliminated at room OUT temperature by trimming improve the ...

Page 10

APPLICATIONS HINTS + 6V SEALED 1.5kΩ 120kΩ LEAD- ACID BATTERY SOURCE FB SPX385 400kΩ FOR 5.5 V 100kΩ Figure 4. Low Battery Disconnect 39kΩ RESET - C4 + 39kΩ 100kΩ 1kΩ LEAD- 1% ACID BATTERY 1% 1kΩ 10kΩ ...

Page 11

APPLICATIONS HINTS 3 AUX SHUTDOW SD INPUT OFF ON GND + TEMP AS35 SENSOR - Figure 6. System Over Temperature Protection 4 20mA OUT 1N4001 SPX2954 7 0.1µF FB GND 4 1N457 MIN VOLTAGE = ...

Page 12

E E FRONT VIEW Thermal Pad (L1) D1 BACK VIEW E1 Date: 12/9/05 Chamfer Optional Gauge Plane L 3 Pin TO-263 JEDEC TO-263 Inches SYMBOL Controlling Dimension MIN NOM A 0.160 - ...

Page 13

Pin TO-92 Dimensions in Inches: SYMBOL Controlling Dimension MIN NOM MAX A 0.170 - 0.195 b 0.014 - 0.020 E 0.130 - 0.155 e 0.095 - 0.105 e1 0.045 - 0.055 L 0.500 - 0.610 ...

Page 14

FRONT VIEW L e Seating Plane SIDE VIEW Chamfer Optional C A2 Date: 12/9/05 ø Pin TO-220 Dimensions in Inches: SYMBOL Controlling Dimension MIN A 0.140 A1 0.020 ...

Page 15

Pin1 Designator to be within this e INDEX AREA (D/2 x E1/2) TOP VIEW FRONT VIEW Gauge Plane ø 8 Pin NSOIC SYMBOL ...

Page 16

Pin SOT-223 SYMBOL ø SIPEX Pkg Signoff Date/Rev: Date: 12/9/ TOP VIEW b Gauge Plane A L2 ...

Page 17

... SPX2954AS-3-3 ............................................ 0.5% ................................... 3.3V ........................................................ 8 lead SOIC SPX2954AS-5-0 ............................................ 0.5% ................................... 5.0V ........................................................ 8 lead SOIC SPX2954S-3-3 ................................................. 1% ..................................... 3.3V ........................................................ 8 lead SOIC SPX2954S-5-0 ................................................. 1% ..................................... 5.0V ........................................................ 8 lead SOIC SPX2954AM3-3-3 .......................................... 0.5% ................................... 3.3V ........................................................ 3 lead SOT-223 SPX2954AM3-5-0 .......................................... 0.5% ................................... 5.0V ........................................................ 3 lead SOT-223 SPX2954M3-3-3 .............................................. 1% ..................................... 3.3V ........................................................ 3 lead SOT-223 SPX2954M3-5-0 .............................................. 1% ..................................... 5.0V ........................................................ 3 lead SOT-223 Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation ...

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