LTC1551L

PRODUCTION

Low Noise, Switched Capacitor Regulated Voltage Inverters

Part Models: 8
1ku List Price: Starting From $2.48

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Overview

Regulated Negative Voltage from a Single Positive Supply
Low Output Ripple: Less Than 1mV_P-P Typ
High Charge Pump Frequency: 900kHz Typ
Small Charge Pump Capacitors: 0.1µF
Requires Only Four External Capacitors
Fixed ±4.1V, ±2.5V, ±2V or Adjustable Output
Shutdown Mode Drops Supply Current to <1µA
High Output Current: Up to 20mA (Depending on V_CC to V_OUT Range)
Output Regulation: 2.5% Over Line, Load and Temperature
Available in 8-Lead MSOP, 8-Lead Narrow SO and 16-Lead Narrow SSOP

The LTC1550L/LTC1551L are switched capacitor charge pump voltage inverters which include internal linear post-regulators to minimize output ripple. The LTC1550L fixed output voltage versions include ±4.1V, ±2.5V and ±2V with ripple voltages typically below 1mV_P-P. The LTC1550L is also available in an adjustable output voltage version. The LTC1550L/LTC1551L are ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications.

The LTC1550L/LTC1551L operate from single 2.7V to 5.5V supplies and draw typical quiescent currents of 3.5mA with a 5V supply. Each device includes a TTL compatible Shutdown pin which drops supply current to 0.2µA typically. The LTC1550L Shutdown pin is active low (SHDN), while the LTC1551L Shutdown pin is active high (SHDN). Only four external components are required: an input bypass capacitor, two 0.1µF charge pump capacitors and a filter capacitor at the linear regulator output. The adjustable LTC1550L/LTC1551L require two additional resistors to set the output voltage. The LTC1550L/LTC1551L will supply up to 20mA (depending on V_CC to V_OUT range), while maintaining guaranteed output regulation of ±2.5%.

Both fixed voltage and adjustable LTC1550L/LTC1551L are available in 8-lead MSOP and SO plastic packages: the adjustable LTC1550L is also available in a 16-pin SSOP with the REG pin.

Applications

GaAs FET Bias Generators
Negative Supply Generators
Battery-Powered Systems
Single Supply Applications

Part Models: 8
1ku List Price: Starting From $2.48

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1551LCMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCMS8-4.1#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCMS8-4.1#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCS8-4.1#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1551LCS8-4.1#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1551LCMS8#PBF	PRODUCTION
LTC1551LCMS8#TRPBF	PRODUCTION
LTC1551LCMS8-4.1#PBF	PRODUCTION
LTC1551LCMS8-4.1#TRPBF	PRODUCTION
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC1551LCMS8#PBF	PRODUCTION
LTC1551LCMS8#TRPBF	PRODUCTION
LTC1551LCMS8-4.1#PBF	PRODUCTION
LTC1551LCMS8-4.1#TRPBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LTC1551LCS8#PBF	PRODUCTION
LTC1551LCS8#TRPBF	PRODUCTION
LTC1551LCS8-4.1#PBF	PRODUCTION
LTC1551LCS8-4.1#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1551LCS8#PBF	PRODUCTION
LTC1551LCS8#TRPBF	PRODUCTION
LTC1551LCS8-4.1#PBF	PRODUCTION
LTC1551LCS8-4.1#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
LTC1551LCS8#PBF	PRODUCTION
LTC1551LCS8#TRPBF	PRODUCTION
LTC1551LCS8-4.1#PBF	PRODUCTION
LTC1551LCS8-4.1#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1551CS8-4.1
LTC1551LCS8
LTC1551LCS8-4.1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.