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LTC3556 Datasheet(PDF) 4 Page - Linear Technology |
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LTC3556 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 50 page  LTC3589/LTC3589-1/ LTC3589-2 4 3589fe ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Operating Input Supply Voltage, VIN l 2.7 5.5 V ISTANDBY VIN Standby Current All Enables = 0V, PWR_ON = 0, ILDO1 = 0 l 818 μA fOSC Oscillator Frequency l 1.8 2.25 2.6 MHz Step-Down Switching Regulators 1, 2, and 3 IVIN Pulse-Skipping Mode VIN Quiescent Current per Buck Burst Mode® VIN Quiescent Current per Buck VFB = 0.85V (Note 5) l l 120 23 200 40 μA μA IFB Feedback Pin Input Current VFB = 0.8V –50 50 nA DX Maximum Duty Cycle VFB = 0V 100 % RSW SW Pull-Down Resistance Regulators Disabled 2.5 kΩ tSS Soft-Start Rate (Note 6) 0.8 V/ms VFB(MAX) Maximum Feedback Voltage BxDTV1 = BxDTV2 = 11111, VIN = 2.7V to 5.5V l 0.735 0.75 0.765 V VFB(LSB) Feedback LSB Step Size 12.5 mV VFB(MIN) Minimum Feedback Voltage BxDTV1 = BxDTV2 = 00000, VIN = 2.7V to 5.5V l 0.351 0.3625 0.374 V 1.6A Step-Down Switching Regulator 1 ILIM1 Peak PMOS Current Limit SW1 l 2.0 2.7 A RP1 RDS(ON) of PMOS1 ISW1 = 100mA 180 mΩ RN1 RDS(ON) of NMOS1 ISW1 = 100mA 110 mΩ 1.0A/1.2A Step-Down Switching Regulators 2 and 3 ILIM2, 3 Peak PMOS Current Limit SW2 and SW3 (LTC3589) Peak PMOS Current Limit SW2 and SW3 (LTC3589-1/ LTC3589-2) l l 1.5 1.8 1.9 2.3 A A RP2, 3 RDS(ON) of PMOS2 and PMOS3 250 mΩ RN2, 3 RDS(ON) of NMOS2 and NMOS3 130 mΩ 1.2A Buck-Boost Switching Regulator 4 (Buck-Boost) IVIN PWM Mode VIN Quiescent Current Burst Mode VIN Quiescent Current VBB_FB = 0.85V (Note 5) l l 115 19 170 35 μA μA VBB_FB Feedback Voltage VIN = 2.7V to 5.5V, VOUT = 5.5V l 0.776 0.8 0.824 V VOUTBB Output Voltage Range 1.8 5.0 V ILIM4 Peak PMOS Current Limit SW4AB l 2.3 2.9 A IPEAK4 Forward Burst Current Limit (Switch A) Burst Mode Operation 600 mA ILIMR4 Reverse Current Limit (Switch D) 1A IZERO4 Reverse Burst Current Limit (Switch D) Burst Mode Operation 0 mA RP4 RDS(ON) of Switch A and Switch D ISW4AB = ISW4CD = 100mA 160 mΩ RN4 RDS(ON) of Switch B and Switch C ISW4AB = ISW4CD = –100mA 110 mΩ ROUT4 BB_OUT Pull-Down Resistance Regulator Disabled 2.5 kΩ tSS Soft-Start Rate (Note 6) 2 V/ms IFB Feedback Pin Input Current VFB = 0.85V –50 50 nA The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = PVIN1 = PVIN2 = PVIN3 = PVIN4 = VIN_LDO2 = VIN_LDO34 = DVDD = 3.8V. All regulators disabled unless otherwise noted. |
Similar Part No. - LTC3556 |
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Similar Description - LTC3556 |
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