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Overview
| Topology | Buck Converter |
| Input voltage | 2.7-17 V |
| Switching frequency | 820-1160 kHz |
| Output 1 | 17 V / 1 A |
| IC revision | C |
Description
The LTC®3621/LTC3621-2 is a high efficiency 17V, 1A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz or 2.25MHz. The regulator features ultralow quiescent current and high efficienciesover 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 1A 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.
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)
- Full Dropout Operation with Low IQ
- 1A Rated Output Current
- ±1% Output Voltage Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- Pulse-Skipping, Forced Continuous, Burst Mode® Operation
- Internal Compensation and Soft-Start
- Overtemperature Protection
- Compact 6-Lead DFN (2mm × 3mm) Package or 8-Lead MSOPE Package with Power Good Output and Independent SGND Pin
Remarks:Refer page no.12 for Inductor Selection Table.
Typical applications
- Automotive Applications
- Portable-Handheld Scanners
- Emergency Radio
- Industrial Computing
- Embedded Computing
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 | ||||
| WE-TPC SMT Tiny Power Inductor, 3.9 µH, 1.72 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance3.9 µH | Rated Current1.72 A | Saturation Current1.65 A | Self Resonant Frequency55 MHz | MountSMT | ||||
| WE-TPC SMT Tiny Power Inductor, 4.7 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance4.7 µH | Rated Current1.55 A | Saturation Current1.7 A | Self Resonant Frequency60 MHz | MountSMT |