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Analog Devices LTC3624
LTC3624 - 17V, 2A Synchronous Step-Down Regulator with 3.5μA Quiescent Current
Overview
| Topology | Buck Converter |
| Input voltage | 2.7-17 V |
| Switching frequency | 920-1080 kHz |
| Output 1 | 2.7 V / 2 A |
| IC revision | C |
Description
The LTC®3624/LTC3624-2 is a high efficiency 17V, 2A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz (LTC3624) or 2.25MHz (LTC3642-2) with a ±40% synchronization range. The regulator features ultralow quiescent current and high efficiency over a wide VOUT range.
The step-down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range from 0.6V to VIN while delivering up to 2A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest voltage ripple. The MODE pin can also be used to sync the switching frequency to an external clock.
Features
- Wide VIN Range: 2.7V to 17V
- Wide VOUT Range: 0.6V to VIN
- 95% Max Efficiency
- Low IQ: 3.5μA, Zero-Current Shutdown
- Constant Frequency (1MHz/2.25MHz)
- Fixed VOUT Options Available
- Low Dropout Operation (100% Duty Cycle) with Ultralow IQ
- 2A Rated Output Current
- ±1% Output Voltage Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- Synchronizable to External Clock
- Pulse-Skipping, Forced Continuous, Burst Mode® Operation
- Internal Compensation and Soft-Start
- Overtemperature Protection
- Compact 8-Lead DFN (3mm × 3mm) Package
Remarks:Table 1. Inductor Selection TableRefer page no.13
Typical applications
- Emergency Radios
- Battery Powered Equipment
- Portable Instrumentation
- General Purpose Step-Down Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TPC SMT Tiny Power Inductor, 1.2 µH, 3.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.2 µH | Rated Current3.1 A | Saturation Current2.8 A | Self Resonant Frequency150 MHz | MountSMT | ||||
| WE-TPC SMT Tiny Power Inductor, 1.8 µH, 2.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance1.8 µH | Rated Current2.7 A | Saturation Current2.45 A | Self Resonant Frequency120 MHz | MountSMT | ||||
| WE-TPC SMT Tiny Power Inductor, 2.2 µH, 2.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance2.2 µH | Rated Current2.5 A | Saturation Current2.35 A | Self Resonant Frequency100 MHz | MountSMT | ||||
| WE-TPC SMT Tiny Power Inductor, 2.7 µH, 2.35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance2.7 µH | Rated Current2.35 A | Saturation Current1.95 A | Self Resonant Frequency80 MHz | MountSMT | ||||
| WE-TPC SMT Tiny Power Inductor, 3.3 µH, 2.15 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance3.3 µH | Rated Current2.15 A | Saturation Current1.8 A | Self Resonant Frequency80 MHz | MountSMT |