Datasheet LT3033 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 3A, 0.95V to 10V, Very Low Dropout Linear Regulator with Programmable Current Limit |
| 页数 / 页 | 24 / 1 — FEATURES. DESCRIPTION. Single Supply VIN Range: 0.95V to 10V. Dropout … |
| 修订版 | A |
| 文件格式/大小 | PDF / 3.7 Mb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Single Supply VIN Range: 0.95V to 10V. Dropout Voltage: 95mV Typical. Output Current: 3A
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LT3033 3A, 0.95V to 10V, Very Low Dropout Linear Regulator with Programmable Current Limit
FEATURES DESCRIPTION
n
Single Supply VIN Range: 0.95V to 10V
The LT®3033 is a very low dropout voltage (VLDO™) linear n
Dropout Voltage: 95mV Typical
regulator that operates from a single input supply down to n
Output Current: 3A
0.95V. The device supplies 3A output current with 95mV n
Adjustable Output Voltage: 200mV to 9.7V
typical dropout voltage. The LT3033 is ideal for low input n
Single Capacitor Soft-Starts Reference and Lowers
voltage to low output voltage applications, providing
Output Noise
comparable electrical efficiency to a switching regulator. n Stable with Low ESR, Ceramic Output Capacitors The LT3033 optimizes stability and transient response n 0.075% Typical Load Regulation from 1mA to 3A with low ESR ceramic output capacitors as small as 10μF. n Quiescent Current: 1.9mA Typical Other features include programmable current limit, an n Quiescent Current in Shutdown: 22μA Typical output current monitor and a power good flag to indicate n Power Good (PWRGD) Flag (Status Valid in Shutdown) n output voltage regulation. In shutdown, quiescent cur- Current Limit Protection with Foldback n rent typically drops to 22μA. Internal protection circuitry Programmable Current Limit n includes reverse-battery protection, current limiting with Output Current Monitor: IOUT/2650 n foldback, thermal limiting with hysteresis and reverse- Thermal Limiting with Hysteresis n current protection. Reverse Battery, Reverse Output, and Reverse Current Protection The LT3033 is available as an adjustable device with an n 20-Lead 3mm × 4mm QFN Package output voltage down to the 200mV reference. The device is available in a thermally enhanced, low profile 3mm ×
APPLICATIONS
4mm × 0.75mm QFN package. All registered trademarks and trademarks are the property of their respective owners. n High Efficiency Linear Regulators n Battery-Powered Systems n Logic Supplies n Post Regulator for Switching Supplies n Wireless Modems n FPGA Core Supplies
TYPICAL APPLICATION Minimum Input Voltage vs Temperature 1.2V to 0.9V, 3A VLDO Regulator
1.2 1.1 IL = 3A V V OUT 1.0 IN IN 1.2V OUT 0.9V 0.9 100k 13.7k 10nF 10µF 3A LT3033 1% TAGE (V) 0.8 10µF SHDN ADJ 0.7 3.92k 0.6 PWRGD 1% 0.5 500mV AT 0.4 I IMON ILIM OUT = 3A 0.3 442Ω GND REF/BYP MINIMUM INPUT VOL 0.2 10nF 0.1 3033 TA01a 0–75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3033 TA01b Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Single Supply VIN Range: 0.95V to 10V
The LT®3033 is a very low dropout voltage (VLDO™) linear n
Dropout Voltage: 95mV Typical
regulator that operates from a single input supply down to n
Output Current: 3A
0.95V. The device supplies 3A output current with 95mV n
Adjustable Output Voltage: 200mV to 9.7V
typical dropout voltage. The LT3033 is ideal for low input n
Single Capacitor Soft-Starts Reference and Lowers
voltage to low output voltage applications, providing
Output Noise
comparable electrical efficiency to a switching regulator. n Stable with Low ESR, Ceramic Output Capacitors The LT3033 optimizes stability and transient response n 0.075% Typical Load Regulation from 1mA to 3A with low ESR ceramic output capacitors as small as 10μF. n Quiescent Current: 1.9mA Typical Other features include programmable current limit, an n Quiescent Current in Shutdown: 22μA Typical output current monitor and a power good flag to indicate n Power Good (PWRGD) Flag (Status Valid in Shutdown) n output voltage regulation. In shutdown, quiescent cur- Current Limit Protection with Foldback n rent typically drops to 22μA. Internal protection circuitry Programmable Current Limit n includes reverse-battery protection, current limiting with Output Current Monitor: IOUT/2650 n foldback, thermal limiting with hysteresis and reverse- Thermal Limiting with Hysteresis n current protection. Reverse Battery, Reverse Output, and Reverse Current Protection The LT3033 is available as an adjustable device with an n 20-Lead 3mm × 4mm QFN Package output voltage down to the 200mV reference. The device is available in a thermally enhanced, low profile 3mm ×
APPLICATIONS
4mm × 0.75mm QFN package. All registered trademarks and trademarks are the property of their respective owners. n High Efficiency Linear Regulators n Battery-Powered Systems n Logic Supplies n Post Regulator for Switching Supplies n Wireless Modems n FPGA Core Supplies
TYPICAL APPLICATION Minimum Input Voltage vs Temperature 1.2V to 0.9V, 3A VLDO Regulator
1.2 1.1 IL = 3A V V OUT 1.0 IN IN 1.2V OUT 0.9V 0.9 100k 13.7k 10nF 10µF 3A LT3033 1% TAGE (V) 0.8 10µF SHDN ADJ 0.7 3.92k 0.6 PWRGD 1% 0.5 500mV AT 0.4 I IMON ILIM OUT = 3A 0.3 442Ω GND REF/BYP MINIMUM INPUT VOL 0.2 10nF 0.1 3033 TA01a 0–75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3033 TA01b Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts