Datasheet LTC3526L-2, LTC3526LB-2 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | 550mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
| Seiten / Seite | 16 / 7 — (Refer to Block Diagram). LOW VOLTAGE START-UP |
| Dateiformat / Größe | PDF / 346 Kb |
| Dokumentensprache | Englisch |
(Refer to Block Diagram). LOW VOLTAGE START-UP
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LTC3526L-2/LTC3526LB-2 block DiagraM L1 V 2.2µH IN 0.8V TO 5V CIN 3 1 2.2µF VIN SW VOUT VSEL WELL V SWITCH BEST VB V V OUT OUT 1.5V ANTI-RING 6 TO 5.25V GATE DRIVERS AND R2 ANTI-CROSS SHDN FB C 4 SHUTDOWN SHUTDOWN CONDUCTION – + 5 OUT I 4.7µF ZERO 4M 3 COMP R1 I SLOPE PK V COMP REF VREF – COMP IPK UVLO + ERROR AMP IZERO SLEEP COMP START-UP + VREF LOGIC MODE – 2MHz CLK CONTROL OSC CLAMP THERMAL TSD WAKE SHUTDOWN CSS EXPOSED PAD GND 7 2 3526lb2 BD operaTion
(Refer to Block Diagram)
The LTC3526L-2/LTC3526LB-2 are 2MHz synchronous range of load currents. Burst Mode operation maintains boost converters housed in a 6-lead 2mm × 2mm DFN high efficiency at very light loads, reducing the quiescent package. With a guaranteed ability to start up and oper- current to just 9µA. Operation can be best understood by ate from inputs less than 0.8V, this device features fixed referring to the Block Diagram. frequency, current mode PWM control for exceptional line and load regulation. The current mode architecture with
LOW VOLTAGE START-UP
adaptive slope compensation provides excellent transient load response, requiring minimal output filtering. Internal The LTC3526L-2/LTC3526LB-2 include an independent soft-start and internal loop compensation simplifies the start-up oscillator designed to start up at an input voltage design process while minimizing the number of external of 0.68V (typical). Soft-start and inrush current limiting components. are provided during start-up, as well as normal mode. With its low R When either V DS(ON) and low gate charge internal N-channel IN or VOUT exceeds 1.3V typical, the IC MOSFET switch and P-channel MOSFET synchronous recti- enters normal operating mode. When the output voltage fier, the LTC3526L-2 achieves high efficiency over a wide 3526lb2fa Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
(Refer to Block Diagram)
The LTC3526L-2/LTC3526LB-2 are 2MHz synchronous range of load currents. Burst Mode operation maintains boost converters housed in a 6-lead 2mm × 2mm DFN high efficiency at very light loads, reducing the quiescent package. With a guaranteed ability to start up and oper- current to just 9µA. Operation can be best understood by ate from inputs less than 0.8V, this device features fixed referring to the Block Diagram. frequency, current mode PWM control for exceptional line and load regulation. The current mode architecture with
LOW VOLTAGE START-UP
adaptive slope compensation provides excellent transient load response, requiring minimal output filtering. Internal The LTC3526L-2/LTC3526LB-2 include an independent soft-start and internal loop compensation simplifies the start-up oscillator designed to start up at an input voltage design process while minimizing the number of external of 0.68V (typical). Soft-start and inrush current limiting components. are provided during start-up, as well as normal mode. With its low R When either V DS(ON) and low gate charge internal N-channel IN or VOUT exceeds 1.3V typical, the IC MOSFET switch and P-channel MOSFET synchronous recti- enters normal operating mode. When the output voltage fier, the LTC3526L-2 achieves high efficiency over a wide 3526lb2fa Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts