SI91842DT-33-T1-E3 Vishay, SI91842DT-33-T1-E3 Datasheet

SI91842DT-33-T1-E3

Manufacturer Part Number

SI91842DT-33-T1-E3

Description

IC,VOLT REGULATOR,FIXED,+3.3V,CMOS,TSOP,5PIN,PLASTIC

Manufacturer

Vishay

Datasheet

1.SI91842.pdf (10 pages)

Specifications of SI91842DT-33-T1-E3

Rohs Compliant

YES

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DESCRIPTION

The Si91842 is a 150-mA CMOS LDO (low dropout) voltage

regulator. It is the perfect choice for low voltage, low power

applications. An ultra low ground current and ultra fast turn-on

make this part attractive for battery operated power systems.

The Si91842 also offers ultra low dropout voltage to prolong

battery life in portable electronics. Systems requiring a quiet

voltage source will benefit from the Si91842’s low output noise.

The Si91842 is designed to maintain regulation while

delivering 300-mA peak current, making it ideal for systems

that have a high surge current upon turn-on.

For better transient response and regulation, an active

Document Number: 71732

S-50956—Rev. F, 16-May-05

FEATURES

D Ultra Low Dropout—130 mV at 150-mA Load

D Low Noise—75 mV

D Out-of-Regulation Error Flag (power good)

D Shutdown Control

D 110-mA Ground Current at 150-mA Load

D Fast Start-Up (50 mS)

D 1.5% Guaranteed Output Voltage Accuracy (1.2 V, 2%)

D 300-mA Peak Output Current Capability

D Uses Low ESR Ceramic Capacitors

D Fast Line and Load Transient Response (v 30 ms)

D 1-mA Maximum Shutdown Current

D Output Current Limit

D Reverse Battery Protection

D Built-in Short Circuit and Thermal Protection

TYPICAL APPLICATION CIRCUIT

(10-Hz to 100-kHz Bandwidth)

(rms)

With Error Flag and Discharge Option

150-mA Low-Noise LDO Regulator

1 mF

Thin SOT-23, 5-Lead

GND

Available

Si91842

ERROR

OUT

pull-down circuit is built into the Si91842 to clamp the output

voltage when it rises beyond normal regulation. The Si91842

automatically discharges the output voltage by connecting the

output to ground through a 100-W n-channel MOSFET when

the device is put in shutdown mode.

The Si91842 features reverse battery protection to limit

reverse current flow to approximately 1-mA in the event

reversed battery is applied at the input, thus preventing

damage to the IC.

The Si91842 is available in both standard and lead (Pb)-free

packages.

D Output—Auto-Discharge In Shutdown Mode

D Fixed 1.2, 1.8, 2.5, 2.6, 2.8, 2.85, 3.0, 3.3, 5.0-V Output

D Thin SOT23-5 Package

APPLICATIONS

D Cellular Phones, Wireless Handsets

D Noise-Sensitive Electronic Systems, Laptop and

D PDAs

D Pagers

D Digital Cameras

D MP3 Player

D Wireless Modem

Voltage Options

Palmtop Computers

51 kW

1 mF

ERROR

OUT

Vishay Siliconix

Si91842

www.vishay.com

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