LTC3204-3.3/LTC3204-5/ LTC3204B-3.3/LTC3204B-5 Low Noise Regulated Charge Pump in 2 2 DFN FEATURES DESCRIPTIO Fixed 3.3V or 5V Outputs The LTC 3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 V Range: are low noise, constant frequency (1.2MHz) switched ca- IN 1.8V to 4.5V (LTC3204-3.3/LTC3204B-3.3) pacitor voltage doublers. The LTC3204-3.3/LTC3204B-3.3 2.7V to 5.5V (LTC3204-5/LTC3204B-5) can produce a regulated output voltage of 3.3V Output Current: from a minimum input voltage of 1.8V (2 alkaline cells) Up to 150mA (LTC3204-5/LTC3204B-5) whereas the LTC3204-5/LTC3204B-5 can produce 5V from Up to 50mA (LTC3204-3.3/LTC3204B-3.3) a minimum of 2.7V (Li-Ion battery) input. Automatic Burst Mode Operation with I = 48A Q LTC3204-3.3/LTC3204-5 feature automatic Burst Mode (LTC3204-3.3/LTC3204-5) operation at light loads to maintain low supply current Constant Frequency Operation at All Loads whereas LTC3204B-3.3/LTC3204B-5 feature constant (LTC3204B-3.3/LTC3204B-5) frequency operation at any load. Built-in soft-start circuitry Low Noise Constant Frequency (1.2MHz) Operation* prevents excessive inrush current during start-up. Thermal Built-In Soft-Start Reduces Inrush Current shutdown and current-limit circuitry allow the parts to Shutdown Disconnects Load from Input survive a continuous short-circuit from V to GND. OUT Shutdown Current <1A High switching frequency minimizes overall solution Short-Circuit/Thermal Protection footprint by allowing the use of tiny ceramic capaci- Available in Low Prole 6-Lead DFN Package U tors. In shutdown, the load is disconnected from the APPLICATIO S input and the quiescent current is reduced to <1A. The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are 2 AA Cell to 3.3V available in a low prole (0.75mm) 6-lead 2mm 2mm Li-Ion to 5V DFN package. USB On-The-Go Devices , LTC and LT are registered trademarks of Linear Technology Corporation. White LED Drivers All other trademarks are the property of their respective owners. Handheld Devices Burst Mode is a registered trademark of Linear Technology Corporation. *Protected by U.S. Patents including 6411531. TYPICAL APPLICATIO Output Ripple vs Load Current 30 OUTPUT CAPACITANCE = 2.2 F 2.2 F V = 3.6V IN 25 5 4 + C C 2 3 20 2.7V TO 5.5V V V 5V OUT IN 2.2 F LTC3204-5/ 2.2 F 15 LTC3204-5 LTC3204B-5 1, 7 GND 10 6 LTC3204B-5 OFF ON SHDN 5 3204 TA01a 0 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) 3204 TA01b 3204fa 1 OUTPUT RIPPLE (mVp-p) U ULTC3204-3.3/LTC3204-5/ LTC3204B-3.3/LTC3204B-5 U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART V to GND ...................................................0.3V to 6V NUMBER IN V to GND .............................................0.3V to 5.5V LTC3204EDC-3.3 OUT TOP VIEW SHDN to GND ...............................................0.3V to 6V LTC3204EDC-5 V Short-Circuit Duration ............................. Indenite LTC3204BEDC-3.3 OUT GND 1 6 SHDN Operating Temperature Range (Note 2) ...40C to 85C LTC3204BEDC-5 2 7 V 5 C IN DC PART Storage Temperature Range .................. 65C to 125C + V 3 4 C OUT MARKING Maximum Junction Temperature .......................... 125C LBJV DC PACKAGE 6-LEAD (2mm 2mm) PLASTIC DFN LBNK T = 125C, = 80C/W JMAX JA LBVF EXPOSED PAD IS GND (PIN 7) MUST BE SOLDERED TO PCB LBVG Consult LTC Marketing for parts specied with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specications which apply over the full operating temperature range. Specications are at T = 25C, V = 2.4V (LTC3204-3.3/LTC3204B-3.3) or 3.6V (LTC3204-5/LTC3204B-5), A IN SHDN = V , C = 2.2F, C = 2.2F, C = 2.2F unless otherwise noted. IN FLY IN OUT SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Input Voltage Range (LTC3204-3.3/LTC3204B-3.3) 1.8 4.5 V IN (LTC3204-5/LTC3204B-5) 2.7 5.5 V V Output Voltage Range 1.8V < V < 4.5V, I < 40mA OUT IN OUT 1.9V < V < 4.5V, I < 50mA (LTC3204-3.3/LTC3204B-3.3) 3.168 3.3 3.432 V IN OUT 2.7V < V < 5.5V, I < 65mA IN OUT 3.1V < V < 5.5V, I < 150mA (LTC3204-5/LTC3204B-5) 4.8 5 5.2 V IN OUT I No Load Input Current I = 0 (LTC3204-3.3) 48 A IN OUT I = 0 (LTC3204-5) 60 A OUT I = 0 (LTC3204B-3.3) 1.25 mA OUT I = 0 (LTC3204B-5) 3.6 mA OUT I Shutdown Current SHDN = 0V, V = 0V 1 A SHDN OUT I Burst Mode Threshold (LTC3204-3.3) 15 mA BURST (LTC3204-5) 20 mA V Output Ripple I = 100mA 20 mV R OUT P-P Efciency V = 3V, I = 100mA (LTC3204-5/LTC3204B-5) 82 % IN OUT f Switching Frequency 0.6 1.2 1.8 MHz OSC V SHDN Input Threshold 1.3 V IH V SHDN Input Threshold 0.4 V IL I SHDN Input Current 1 1 A IH I SHDN Input Current SHDN = 0V 1 1 A IL R Effective Open-Loop Output V = 1.8V, V = 3V (LTC3204-3.3/LTC3204B-3.3) 7 OL IN OUT Resistance (Note 3) V = 2.7V, V = 4.5V (LTC3204-5/LTC3204B-5) 6 IN OUT I Output Current Limit V = OV 300 mA LIM OUT T Soft-Start Time From the Rising Edge of SHDN to 90% of V 0.75 ms SS OUT Note 1: Absolute Maximum Ratings are those beyond which the life of a Specications over the 40C to 85C operating temperature range are device may be impaired. assured by design, characterization and correlation with statistical process controls. Note 2: The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are guaranteed to meet performance specications from 0C to 70C. Note 3: R (2V V )/I OL IN OUT OUT 3204fa 2 U W W W