Datasheet LTC3429, LTC3429B (Analog Devices) - 2

LTC3429/LTC3429B
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
ORDER PART VIN Voltage .. –0.3V to 4.4V TOP VIEW NUMBER SW Voltage ... – 0.3V to 6V SW 1 6 V SHDN, FB Voltage ... – 0.3V to 6V IN LTC3429ES6 GND 2 5 VOUT VOUT ... – 0.3V to 6V LTC3429BES6 FB 3 4 SHDN Operating Temperature Range (Note 2) .. – 40°C to 85°C S6 PACKAGE S6 PART MARKING Storage Temperature Range ... – 65°C to 150° 6-LEAD PLASTIC TSOT-23 Lead Temperature (Soldering, 10 sec).. 300°C LTH5 TJMAX = 125°C, θJC = 102°C/W LTBMS Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 1.2V, VOUT = 3.3V, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Start-Up Voltage ILOAD = 1mA, VOUT = 0V 0.85 1 V Minimum Operating Voltage SHDN = VIN (Note 3) 0.5 0.65 V Output Voltage Adjust Range (Note 5) 2.5 5 V Feedback Voltage ● 1.192 1.230 1.268 V Feedback Input Current VFB = 1.25V 1 50 nA Quiescent Current (Burst Mode Operation) VFB = 1.4V (Note 4) 20 30 µA Quiescent Current (Shutdown) VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V 0.01 1 µA Quiescent Current (Active) Measured on VOUT, Nonswitching 380 550 µA NMOS Switch Leakage VSW = 5V 0.1 5 µA PMOS Switch Leakage VSW = 5V, VOUT = 0V 0.1 5 µA NMOS Switch On Resistance 0.35 Ω PMOS Switch On Resistance 0.45 Ω NMOS Current Limit 600 850 mA Burst Mode Operation Current Threshold L = 4.7µH (LTC3429 Only) 1.25 mA Current Limit Delay to Output 40 ns Max Duty Cycle VFB = 1.15V ● 80 90 % Switching Frequency ● 380 500 620 kHz SHDN Input High 1 V SHDN Input Low 0.35 V SHDN Input Current VSHDN = 5.5V 0.01 1 µA Soft-Start Time SHDN to 90% of VOUT 2.5 ms
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Minimum VIN operation after start-up is only limited by the of a device may be impaired. battery’s ability to provide the necessary power as it enters a deeply
Note 2:
The LTC3429ES6/LTC3429BES6 are guaranteed to meet discharged state. performance specifications from 0°C to 70°C. Specifications over the
Note 4:
Burst Mode operation IQ is measured at VOUT. Multiply this value –40°C to 85°C operating temperature range are assured by design, by VOUT/VIN to get the equivalent input (battery) current. characterization and correlation with statistical process controls.
Note 5:
For applications where VOUT > 4.3V, an external Schottky diode is required. See the Applications Information. 3429fa 2