LTC3026 1.5A Low Input Voltage VLDO Linear Regulator Fea T Descrip T n Input Voltage Range: The LTC 3026 is a very low dropout (VLDO) linear regula- 1.14V to 3.5V (with Boost Enabled) tor that can operate at input voltages down to 1.14V. The 1.14V to 5.5V (with External 5V Boost) device is capable of supplying 1.5A of output current with n Low Dropout Voltage: 100mV at I = 1.5A a typical dropout voltage of only 100mV. To allow opera- OUT n Adjustable Output Range: 0.4V to 2.6V tion at low input voltages the LTC3026 includes a boost n Output Current: Up to 1.5A converter that provides the necessary headroom for the n Excellent Supply Rejection Even Near Dropout internal LDO circuitry. n Shutdown Disconnects Load from V and V IN BST Output current comes directly from the input supply to n Low Operating Current: I = 950A at V = 1.5V IN IN maximize efficiency. The boost converter requires only a n Low Shutdown Current: small chip inductor and ceramic capacitor for operation. I < 1A (Typ), I = 0.1A (Typ) IN BST Additionally, the boosted output voltage of one LTC3026 n Stable with 10F or Greater Ceramic Capacitors can supply the boost voltage for other LTC3026s, thus n Short-Circuit, Reverse Current Protected requiring a single inductor for multiple LDOs. A user sup- n Overtemperature Protected plied boost voltage can be used eliminating the need for n Available in 10-Lead MSOP and 10-Lead an inductor altogether. (3mm 3mm) DFN Packages The LTC3026 regulator is stable with 10F or greater ceramic output capacitors. The device has a low 0.4V a T reference voltage which is used to program the output n High Efficiency Linear Regulator voltage via two external resistors. The device also has n Post Regulator for Switching Supplies internal current limit, overtemperature shutdown, and n Microprocessor Supply reverse output current protection. The LTC3026 is avail- L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks able in a small 10-lead MSOP or low profile (0.75mm) and ThinSOT, VLDO are trademarks of Linear Technology Corporation. All other trademarks are 10-lead 3mm 3mm DFN package. the property of their respective owners. Typical a T 1.2V Output Voltage from 1.5V Input Supply Dropout Voltage vs Output Current 150 L1 SW 10H BST 5V BOOST CONVERTER 4.7F 100 IN 1.2V V = 1.5V IN 1.5V 4.7F 2.0V 0.4V + 2.6V OUT V = 1.2V, OUT 50 1.5A 8.06k ADJ C OUT OFF ON SHDN 10F 0 LTC3026 100k 4.02k 0 1.0 1.5 0.5 GND PG I (A) OUT 3026 TA01a 3026 TA01b L1: MURATA LQH2MCN100K02 3026ff 1 DROPOUT (mV) ion pplica ions pplica ion uresLTC3026 a Te Maxi Mu M r a T (Note 1) V to GND ................................................. 0.3V to 6V Output Short-Circuit Duration .......................... Indefinite BST V to GND ................................................... 0.3V to 6V Operating Junction Temperature Range IN PG to GND ................................................... 0.3V to 6V (Note 8) ............................................. 40C to 125C SHDN to GND ............................................ 0.3V to 6.3V Storage Temperature Range .................. 65C to 125C ADJ to GND .................................. 0.3V to (V + 0.3V) Lead Temperature (MSE, Soldering, 10 sec) .........300C IN p in c F T TOP VIEW TOP VIEW IN 1 10 OUT IN 1 10 OUT IN 2 9 OUT IN 2 9 OUT 11 11 GND 3 8 ADJ GND 3 8 ADJ GND GND SW 4 7 PG SW 4 7 PG BST 5 6 SHDN BST 5 6 SHDN MSE PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE T = 125C, = 40C/W JMAX JA 10-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB T = 125C, = 40C/W JMAX JA EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3026EDD PBF LTC3026EDD TRPBF LBHW 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3026IDD PBF LTC3026IDD TRPBF LBHW 40C to 125C 10-Lead (3mm 3mm) Plastic DFN LTC3026EMSE PBF LTC3026EMSE TRPBF LTBJB 10-Lead Plastic MSOP 40C to 125C LTC3026IMSE PBF LTC3026IMSE TRPBF LTBJB 10-Lead Plastic MSOP 40C to 125C LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3026EDD LTC3026EDD TR LBHW 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LTC3026IDD LTC3026IDD TR LBHW 40C to 125C 10-Lead (3mm 3mm) Plastic DFN LTC3026EMSE LTC3026EMSE TR LTBJB 10-Lead Plastic MSOP 40C to 125C LTC3026IMSE LTC3026IMSE TR LTBJB 10-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. For more information on lead free part marking, go to: