Datasheet Linear Technology LT1121ACS8#PBF

ManufacturerLinear Technology
SeriesLT1121
Part NumberLT1121ACS8#PBF

Micropower Low Dropout Regulators with Shutdown

Datasheets

Datasheet LT1121, LT1121-3.3, LT1121-5
PDF, 275 Kb, Language: en, File uploaded: Sep 2, 2017, Pages: 16
Micropower Low Dropout Regulators with Shutdown
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Prices

Packaging

PackageSO-8
Package CodeS8
Package Index05-08-1610 (S8)

Parametrics

Design ToolsLTspice File
Discrete Pass Elementno
Dropout Voltage0.42 V
Export Controlno
FeaturesShutdown
Ishutdown16 µA
Isupply0.03 mA
Max Junction Temp150 Deg
Number of Outputs1
Operating Temperature Range0 to 70 °C
Output Current0.150 A
Output VoltageAdj, 3.3, 5
Theta JA120В°C/W (N8, S8), 50В°C/W (ST), 150В°C/W (Z)
TypePNP
Vin Max36 V
Vin Min4.17 V
Vout Max30 V
Vout Min3.75 V

Eco Plan

RoHSCompliant

Application Notes

  • Power Conditioning for Notebook and Palmtop Systems &mdash AN51
    PDF, 260 Kb, File published: Aug 3, 1992
    Notebook and palmtop systems need a number of voltages developed from a battery. Competitive solutions require small size, high efficiency and light weight. This publication includes circuits for high efficiency 5V and 3.3V switching and linear regulators, back light display drivers and battery chargers. All the circuits are specifically tailored for the requirements outlined above.
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  • Micropower High Side MOSFET Drivers &mdash AN53
    PDF, 226 Kb, File published: Jan 3, 1993
    This application note describes the operation of high-side Nchannel MOSFET switch drivers designed specifically for operation in battery-powered equipment, such as notebook and palmtop computers and portable medical instruments. A selection guide simplifies the proper choice of MOSFET and driver for a particular high-side switch application. Circuits to drive and protect load impedances ranging from large inductors to large capacitors are described and a section on surface mount and copper clad shunts is included.
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  • Power Conversion from Milliamps to Amps at Ultra-High Efficiency (Up to 95%) &mdash AN54
    PDF, 466 Kb, File published: Mar 1, 1993
    This application note discusses the use of the LTC1147, LTC1148, and LTC1149 ultra high efficiency switching regulators in a wide variety of applications. These controllers feature a current-mode architecture which includes an automatic low current operating mode called Burst ModeTM operation, making greater than 90% efficiencies possible at output currents as low as 10mA. This feature maximizes battery life while a product is in sleep or standby modes. In addition, the LTC1148 and LTC1149 are synchronous switching regulators which achieve high efficiency conversion from 10mA to 10A.
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  • 5V to 3.3V Converters for Microprocessor Systems &mdash AN58
    PDF, 310 Kb, File published: Sep 1, 1993
    Many popular microprocessors operate from 3.3V supplies, yet they are used in systems where the predominate source of power is 5V. AN58 presents a collection of both linear and switching regulator solutions for conversion of 5V to 3.3V at currents ranging from 100mA to 20A. Applications information and a comparison of various bypass capacitor types is included. Most of the designs can be easily modified for other intermediate voltages such as 3.45V, 3.7V, and 4.1V.
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  • PCMCIA Card and Card Socket Power Management: &mdash AN60
    PDF, 260 Kb, File published: Jan 1, 1995
    Most portable systems have expansion sockets conforming to the standards set by the Personal Computer Memory Card International Association (PCMCIA). This standard requires the host to perform an unusual amount of switching on both the VCC and VPP voltage lines. Card designers face difficult power management and DC/DC conversion issues of their own. Board real estate and component height are at a premium making design difficult and component selection critical. This application note discusses in detail both the host and card designer issues and highlights several new products designed specifically for these applications.
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  • Linear Technology Magazine Circuit Collection, Volume III &mdash AN67
    PDF, 1.2 Mb, File published: Sep 1, 1996
    Application Note 67 is a collection of circuits for data conversion, interface and signal processing from the first five years of Linear Technology. This application note includes circuits such as fast video multiplexers for high speed video, an ultraselective bandpass filter circuit with adjustable gain, and a fully differential, 8-channel, 12-bit A/D system. The categories included in this app note are data conversion, interface, filters, instrumentation, video/op amps and miscellaneous circuits.
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Design Notes

  • 2-Phase, Dual Switching Regulator Fits in Tight Places &mdash DN210
    PDF, 82 Kb, File published: Aug 1, 1999
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  • Techniques for Deriving 3.3V from 5V Supplies &mdash DN74
    PDF, 73 Kb, File published: Sep 1, 1993
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  • PC Card Power Management Techniques &mdash DN76
    PDF, 77 Kb, File published: Nov 1, 1993
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  • Triple Output 3.3V, 5V, and 12V High Efficiency Notebook Power Supply &mdash DN78
    PDF, 78 Kb, File published: Jan 1, 1994
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  • 5V to 3.3V Regulator with Fail-Safe Switchover &mdash DN82
    PDF, 74 Kb, File published: May 1, 1994
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  • 5V to 3.3V Circuit Collection &mdash DN91
    PDF, 74 Kb, File published: Nov 1, 1994
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  • 12-Bit Rail-to-Rail Micropower DACs in an SO-8 &mdash DN96
    PDF, 76 Kb, File published: Feb 1, 1995
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Model Line

Manufacturer's Classification

  • Power Management > LDO Linear Regulators > Positive Linear Regulators (LDO)

Other Names:

LT1121ACS8PBF, LT1121ACS8 PBF

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