LTC3025-1/LTC3025-2/ LTC3025-3/LTC3025-4 500mA Micropower VLDO Linear Regulators Fea T Descrip T 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 as n Very Low Dropout: 85mV at 500mA low as 0.9V. The device is capable of supplying 500mA of n Adjustable Output Range: 0.4V to 3.6V (LTC3025-1) output current with a typical dropout voltage of only 85mV. n Fixed Output: 1.2V (LTC3025-2), 1.5V (LTC3025-3), A BIAS supply is required to run the internal reference and 1.8V (LTC3025-4) LDO circuitry while output current comes directly from the n 2% Voltage Accuracy over Temperature, IN supply for high efficiency regulation. The LTC3025-1 Supply and Load features an adjustable output with a low 0.4V reference n Low Noise: 80V (10Hz to 100kHz) while the LTC3025-2, LTC3025-3, and LTC3025-4 have RMS n BIAS Voltage Range: 2.5V to 5.5V fixed 1.2V, 1.5V and 1.8V output voltages respectively. n Fast Transient Recovery The LTC3025-Xs low quiescent current makes it an ideal n Shutdown Disconnects Load from V and V IN BIAS choice for use in battery-powered systems. For 3-cell NiMH n Low Operating Current: I = 4A, I = 50A Typ IN BIAS and single cell Li-Ion applications, the BIAS voltage can n Low Shutdown Current: I = 1A, I = 0.01A Typ IN BIAS be supplied directly from the battery while the input can n Output Current Limit come from a high efficiency buck regulator, providing a n Thermal Overload Protection high efficiency, low noise output. n Available in 6-Lead (2mm 2mm) DFN Package Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR a T ceramic capacitors as small as 1F, short-circuit and n Low Power Handheld Devices thermal overload protection and output current limiting. n Low Voltage Logic Supplies The LTC3025-X is available in a tiny, low profile (0.75mm) n DSP Power Supplies 6-lead DFN (2mm 2mm) package. n Cellular Phones L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO n and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the Portable Electronic Equipment property of their respective owners. Protected by U.S. Patents including 7224204, 7218082. n Handheld Medical Instruments n Post Regulator for Switching Supply Noise Rejection Typical a T 1MHz V Supply Rejection IN 1.2V Output Voltage from 1.5V Input Supply 50 45 C = 10F OUT V = 1.2V OUT BIAS OUT 40 I 500mA OUT 0.1F 1F Li-Ion 1.5V HIGH LTC3025-2 35 C = 1F OUT OR EFFICIENCY 1.5V 30 3-CELL DC/DC IN SENSE NiMH BUCK 0.1F 25 20 OFF ON SHDN GND 15 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 30251234ff 1 REJECTION (dB) ion pplica ions pplica ion uresLTC3025-1/LTC3025-2/ LTC3025-3/LTC3025-4 a Te Maxi Mu M r a T p in c F T (Notes 1, 2) TOP VIEW V , V to GND ......................................... 0.3V to 6V BIAS IN SHDN to GND ............................................... 0.3V to 6V BIAS 1 6 SHDN SENSE, ADJ to GND ..................................... 0.3V to 6V 2 7 GND 5 ADJ/SENSE* V ........................................0.3V to V + 0.3V or 6V OUT IN IN 3 4 OUT Operating Junction Temperature Range (Note 3) .................................................. 40C to 125C DC6 PACKAGE 6-LEAD (2mm 2mm) PLASTIC DFN Storage Temperature Range ................... 65C to 125C T = 125C, = 102C/W, = 20C/W 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 Der in F Ma T 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 Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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