Datasheet LTC3458L (Analog Devices) - 2

LTC3458L
W W W U ABSOLUTE AXI U RATI GS PIN CONFIGURATION (Note 1)
TOP VIEW VIN, SS, SYNC Voltages ... –0.3 to 7V SW 1 12 VOUT BURST, SHDN, VOUT Voltages ... –0.3 to 7V V 2 11 BURST IN Operating Temperature Range SYNC 3 10 SS 13 (Notes 2, 3) ...–40°C to 85°C SHDN 4 9 GND Storage Temperature Range ..–65°C to 125°C I 5 8 COMP LIM SW Voltage R 6 7 FB T DC ... –0.3V to 7V DE PACKAGE Pulsed <100ns .. –0.3V to 8V 12-LEAD (4mm × 3mm) PLASTIC DFN EXPOSED PAD IS PGND (PIN 13), MUST BE SOLDERED TO PCB TJMAX = 125°C, θJA = 45°C/W
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3458LEDE#PBF LTC3458LEDE#TRPBF 3458L 12-Lead (4mm x 3mm) Plastic DFN –40ºC to 85ºC Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The
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denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 3.3V, VOUT = 5V, RT = 200k, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum VIN Operating Voltage TA = 0°C to 85°C 1.4 1.5 V TA = –40°C to 0°C 1.4 1.7 V Output Voltage Adjust Range ● 2 6 V Feedback Voltage 0°C to 85°C, VOUT = 3.3V 1.21 1.225 1.25 V –40°C to 0°C 1.20 1.25 V Undervoltage (Exit Burst Mode Operation) Below Feedback Voltage –4 % Feedback Input Current VFB = 1.23V 1 50 nA Quiescent Current – Burst Mode Operation VIN Current at 3.3V 12 30 μA VOUT Current at 5V 5 10 μA Quiescent Current – Shutdown VIN Current at 3.3V 0.5 1 μA VOUT Current at 0V 1 3 μA Quiescent Current – Active VIN Current Switching 1 3 mA NMOS Switch Leakage ● 0.05 5 μA PMOS Switch Leakage ● 0.05 5 μA NMOS Switch On Resistance VOUT = 5V 0.2 Ω PMOS Switch On Resistance VOUT = 5V 0.3 Ω Fixed NMOS Current Limit RILIM = 84.5k ● 1.7 2.1 A Maximum Duty Cycle VIN = 3.3V, fOSC = 1MHz ● 80 90 % Minimum Duty Cycle ● 0 % Frequency Accuracy RT = 200k ● 0.85 1 1.15 MHz Error Amplifier Transconductance 60 μA/V Error Amplifier Source Current 7 μA 3458lfa 2