LTC1551L - LTC1551L是Low Noise, Switched Capacitor Regulated Voltage Inverters

LTC1551L是LINEAR凌力尔特公司的一款GaAsFET 偏置发生器产品，LTC1551L是LTC1551L是Low Noise, Switched Capacitor Regulated Voltage Inverters，本站介绍了LTC1551L的封装应用图解、特点和优点、功能等，并给出了与LTC1551L相关的LINEAR元器件型号供参考。

LTC1551L - LTC1551L是Low Noise, Switched Capacitor Regulated Voltage Inverters - GaAsFET 偏置发生器 - 电源管理 - 凌力尔特

LTC1551L - Low Noise, Switched Capacitor Regulated Voltage Inverters

LTC1551L - Low Noise, Switched Capacitor Regulated Voltage Inverters - Linear Technology（凌力尔特）

功能描述

The LTC?1550L/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 1mVP-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 VCC to VOUT 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.

特点

Regulated Negative Voltage from a Single Positive Supply

Low Output Ripple: Less Than 1mVP-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 VCC to VOUT Range)

Output Regulation: 2.5% Over Line, Load and Temperature

Available in 8-Lead MSOP, 8-Lead Narrow SO and 16-Lead Narrow SSOP

应用

GaAs FET Bias Generators

Negative Supply Generators

Battery-Powered Systems

Single Supply Applications

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1551LCMS8	MS-8	C	$2.25	$1.90
LTC1551LCMS8-4.1	MS-8	C	$2.25	$1.90
LTC1551LCMS8-4.1#PBF	MS-8	C	$2.25	$1.90
LTC1551LCMS8-4.1#TR	MS-8	C		$1.96
LTC1551LCMS8-4.1#TRPBF	MS-8	C		$1.96
LTC1551LCMS8#PBF	MS-8	C	$2.25	$1.90
LTC1551LCMS8#TR	MS-8	C		$1.96
LTC1551LCMS8#TRPBF	MS-8	C		$1.96
LTC1551LCS8	SO-8	C	$2.00	$1.70
LTC1551LCS8-4.1	SO-8	C	$2.00	$1.70
LTC1551LCS8-4.1#PBF	SO-8	C	$2.00	$1.70
LTC1551LCS8-4.1#TR	SO-8	C		$1.76
LTC1551LCS8-4.1#TRPBF	SO-8	C		$1.76
LTC1551LCS8#PBF	SO-8	C	$2.00	$1.70
LTC1551LCS8#TR	SO-8	C		$1.76
LTC1551LCS8#TRPBF	SO-8	C		$1.76

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