LTC3025-1/LTC3025-2/ LTC3025-3/LTC3025-4 500mA Micropower VLDO Linear Regulators FEATURES DESCRIPTION n Wide Input Voltage Range: 0.9V to 5.5V The LTC 3025-X is a micropower, VLDO (very low drop- n Stable with Ceramic Capacitors out) linear regulator which operates from input voltages n Very Low Dropout: 85mV at 500mA as low as 0.9V. The device is capable of supplying 500mA n Adjustable Output Range: 0.4V to 3.6V (LTC3025-1) of output current with a typical dropout voltage of only n Fixed Output: 1.2V (LTC3025-2), 1.5V (LTC3025-3), 85mV. A BIAS supply is required to run the internal ref- 1.8V (LTC3025-4) erence and LDO circuitry while output current comes n 2% Voltage Accuracy over Temperature, directly from the IN supply for high efficiency regulation. Supply and Load The LTC3025-1 features an adjustable output with a low n Low Noise: 80V (10Hz to 100kHz) 0.4V reference while the LTC3025-2, LTC3025-3, and RMS n BIAS Voltage Range: 2.5V to 5.5V LTC3025-4 have fixed 1.2V, 1.5V and 1.8V output volt- n Fast Transient Recovery ages respectively. n Shutdown Disconnects Load from V and V IN BIAS The LTC3025-Xs low quiescent current makes it an ideal n Low Operating Current: I = 4A, I = 50A Typ IN BIAS choice for use in battery-powered systems. For 3-cell n Low Shutdown Current: I = 1A, I = 0.01A Typ IN BIAS NiMH and single cell Li-Ion applications, the BIAS voltage n Output Current Limit can be supplied directly from the battery while the input n Thermal Overload Protection can come from a high efficiency buck regulator, providing n Available in 6-Lead (2mm 2mm) DFN Package a high efficiency, low noise output. n AEC-Q100 Qualification in Progress Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR APPLICATIONS ceramic capacitors as small as 1F, short-circuit and ther- n Low Power Handheld Devices mal overload protection and output current limiting. The n Low Voltage Logic Supplies LTC3025-X is available in a tiny, low profile (0.75mm) n DSP Power Supplies 6-lead DFN (2mm 2mm) package. n Cellular Phones All registered trademarks and trademarks are the property of their respective owners. Protected n by U.S. patents, including 7224204, 7218082. Portable Electronic Equipment n Handheld Medical Instruments n Post Regulator for Switching Supply Noise Rejection 1MHz V Supply Rejection TYPICAL APPLICATION IN 50 1.2V Output Voltage from 1.5V Input Supply 45 C = 10F OUT 40 V = 1.2V OUT BIAS OUT 35 C = 1F I 500mA OUT OUT 0.1F 1F Li-Ion 1.5V HIGH LTC3025-2 30 OR EFFICIENCY 1.5V 3-CELL DC/DC IN SENSE 25 NiMH BUCK 0.1F 20 15 OFF ON SHDN GND 30251234 TA01 10 BIAS = 3.6V I = 100mA 5 OUT V = 1.2V I = 300mA OUT OUT 0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 V (V) IN 30251234 TA01b Rev. G 1 Document Feedback For more information www.analog.com REJECTION (dB)LTC3025-1/LTC3025-2/ LTC3025-3/LTC3025-4 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) TOP VIEW V , V to GND ........................................ 0.3V to 6V BIAS IN 6 BIAS 1 SHDN SHDN to GND ............................................... 0.3V to 6V 7 5 SENSE, ADJ to GND ..................................... 0.3V to 6V GND 2 ADJ/SENSE* V ........................................0.3V to V + 0.3V or 6V IN 3 4 OUT OUT IN Operating Junction Temperature Range DC PACKAGE (Note 3) .................................................. 40C to 125C 6-LEAD (2mm 2mm) PLASTIC DFN T = 125C, = 102C/W, = 20C/W Storage Temperature Range .................. 65C to 125C JMAX JA JC EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB Output Short-Circuit Duration .......................... Indefinite *ADJ FOR LTC3025-1, SENSE FOR LTC3025-2, LTC3025-3, LTC3025-4 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3025EDC-1 PBF LTC3025EDC-1 TRPBF LDDW 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-1 PBF LTC3025IDC-1 TRPBF LDDW 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025EDC-2 PBF LTC3025EDC-2 TRPBF LDMK 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-2 PBF LTC3025IDC-2 TRPBF LDMK 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025EDC-3 PBF LTC3025EDC-3 TRPBF LDQS 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-3 PBF LTC3025IDC-3 TRPBF LDQS 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025EDC-4 PBF LTC3025EDC-4 TRPBF LDPQ 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-4 PBF LTC3025IDC-4 TRPBF LDPQ 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3025EDC-1 LTC3025EDC-1 TR LDDW 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-1 LTC3025IDC-1 TR LDDW 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025EDC-2 LTC3025EDC-2 TR LDMK 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-2 LTC3025IDC-2 TR LDMK 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025EDC-3 LTC3025EDC-3 TR LDQS 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-3 LTC3025IDC-3 TR LDQS 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025EDC-4 LTC3025EDC-4 TR LDPQ 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-4 LTC3025IDC-4 TR LDPQ 6-Lead (2mm 2mm) Plastic DFN 40C to 125C AUTOMOTIVE PRODUCTS** LTC3025EDC-1 WPBF LTC3025EDC-1 WTRPBF LDDW 6-Lead (2mm 2mm) Plastic DFN 40C to 125C LTC3025IDC-1 WPBF LTC3025IDC-1 WTRPBF LDDW 6-Lead (2mm 2mm) Plastic DFN 40C to 125C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. **Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. G 2 For more information www.analog.com