DocumentationDatasheet
Reliability Data
LT Journal
Press Release
- 17V, 2.25MHz, Synchronous Step-Down Regulator Delivers 2A & Requires Only 3.5µA of Quiescent Current
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- LTC3624 Demo Circuit - High Efficiency Buck Regulator with Ultralow Quiescent Current (5.6-17V to 5V @ 2A)
- LTC3624 Demo Circuit - High Efficiency Buck Regulator with Ultralow Quiescent Current (5.6-17V to 5V @ 2A)
- LTC3624-2 Demo Circuit - High Efficiency Buck Regulator with Ultralow Quiescent Current (5.6-17V to 5V @ 2A)
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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
Typical Application
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 (LTC3624-2) 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.
LTC3624/LTC3624-2 Options
| Part Number | Frequency | Vout |
| LTC3624 | 1MHz | Adjustable |
| LTC3624-3.3 | 1MHz | 3.3V |
| LTC3624-5 | 1MHz | 5V |
| LTC3624-2 | 2.25MHz | Adjustable |
| LTC3624-23.3 | 2.25MHz | 3.3 |
| LTC3624-25 | 2.25MHz | 5V |
3x3 DFN-8,MS-12E
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC3624EDD#PBF | DFN | 8 | E | $4.22 | $2.95 |
| LTC3624EDD#TRPBF | DFN | 8 | E | $3.01 | |
| LTC3624EDD-2#PBF | DFN | 8 | E | $4.22 | $2.95 |
| LTC3624EDD-2#TRPBF | DFN | 8 | E | $3.01 | |
| LTC3624EDD-23.3#PBF | DFN | 8 | E | $4.22 | $2.95 |
| LTC3624EDD-23.3#TRPBF | DFN | 8 | E | $3.01 | |
| LTC3624EDD-25#PBF | DFN | 8 | E | $4.22 | $2.95 |
| LTC3624EDD-25#TRPBF | DFN | 8 | E | $3.01 | |
| LTC3624EDD-3.3#PBF | DFN | 8 | E | $4.22 | $2.95 |
| LTC3624EDD-3.3#TRPBF | DFN | 8 | E | $3.01 | |
| LTC3624EDD-5#PBF | DFN | 8 | E | $4.22 | $2.95 |
| LTC3624EDD-5#TRPBF | DFN | 8 | E | $3.01 | |
| LTC3624IDD#PBF | DFN | 8 | I | $4.64 | $3.25 |
| LTC3624IDD#TRPBF | DFN | 8 | I | $3.31 | |
| LTC3624IDD-2#PBF | DFN | 8 | I | $4.64 | $3.25 |
| LTC3624IDD-2#TRPBF | DFN | 8 | I | $3.31 | |
| LTC3624IDD-23.3#PBF | DFN | 8 | I | $4.64 | $3.25 |
| LTC3624IDD-23.3#TRPBF | DFN | 8 | I | $3.31 | |
| LTC3624IDD-25#PBF | DFN | 8 | I | $4.64 | $3.25 |
| LTC3624IDD-25#TRPBF | DFN | 8 | I | $3.31 | |
| LTC3624IDD-3.3#PBF | DFN | 8 | I | $4.64 | $3.25 |
| LTC3624IDD-3.3#TRPBF | DFN | 8 | I | $3.31 | |
| LTC3624IDD-5#PBF | DFN | 8 | I | $4.64 | $3.25 |
| LTC3624IDD-5#TRPBF | DFN | 8 | I | $3.31 | |
| LTC3624IMSE-3.3#PBF | MSOP | 12 | I | $4.64 | $3.25 |
| LTC3624IMSE-5#TRPBF | MSOP | 12 | I | $3.31 | |
| LTC3624IMSE-2#PBF | MSOP | 12 | I | $4.64 | $3.25 |
| LTC3624IMSE-2#TRPBF | MSOP | 12 | I | $3.31 | |
| LTC3624IMSE-23.3#PBF | MSOP | 12 | I | $4.64 | $3.25 |
| LTC3624HMSE-25#TRPBF | MSOP | 12 | H | $3.56 | |
| LTC3624EMSE-3.3#PBF | MSOP | 12 | E | $4.22 | $2.95 |
| LTC3624IMSE-25#PBF | MSOP | 12 | I | $4.64 | $3.25 |
| LTC3624HMSE-5#TRPBF | MSOP | 12 | H | $3.56 | |
| LTC3624HMSE-2#TRPBF | MSOP | 12 | H | $3.56 | |
| LTC3624HMSE-23.3#PBF | MSOP | 12 | H | $5.00 | $3.50 |
| LTC3624HMSE-23.3#TRPBF | MSOP | 12 | H | $3.56 | |
| LTC3624EMSE-25#PBF | MSOP | 12 | E | $4.22 | $2.95 |
| LTC3624EMSE-25#TRPBF | MSOP | 12 | E | $3.01 | |
| LTC3624EMSE-2#TRPBF | MSOP | 12 | E | $3.01 | |
| LTC3624EMSE-23.3#PBF | MSOP | 12 | E | $4.22 | $2.95 |
| LTC3624EMSE-5#TRPBF | MSOP | 12 | E | $3.01 | |
| LTC3624EMSE-5#PBF | MSOP | 12 | E | $4.22 | $2.95 |
| LTC3624HMSE-3.3#TRPBF | MSOP | 12 | H | $3.56 | |
| LTC3624HMSE-5#PBF | MSOP | 12 | H | $5.00 | $3.50 |
| LTC3624EMSE-23.3#TRPBF | MSOP | 12 | E | $3.01 | |
| LTC3624IMSE-3.3#TRPBF | MSOP | 12 | I | $3.31 | |
| LTC3624IMSE-23.3#TRPBF | MSOP | 12 | I | $3.31 | |
| LTC3624HMSE-25#PBF | MSOP | 12 | H | $5.00 | $3.50 |
| LTC3624HMSE-3.3#PBF | MSOP | 12 | H | $5.00 | $3.50 |
| LTC3624IMSE-25#TRPBF | MSOP | 12 | I | $3.31 | |
| LTC3624HMSE-2#PBF | MSOP | 12 | H | $5.00 | $3.50 |
| LTC3624IMSE-5#PBF | MSOP | 12 | I | $4.64 | $3.25 |
| LTC3624EMSE-3.3#TRPBF | MSOP | 12 | E | $3.01 | |
| LTC3624EMSE-2#PBF | MSOP | 12 | E | $4.22 | $2.95 |
| LTC3624IMSE#PBF | MSOP | 12 | I | $4.64 | $3.25 |
| LTC3624IMSE#TRPBF | MSOP | 12 | I | $3.31 | |
| LTC3624EMSE#TRPBF | MSOP | 12 | E | $3.01 | |
| LTC3624EMSE#PBF | MSOP | 12 | E | $4.22 | $2.95 |
| LTC3624HMSE#TRPBF | MSOP | 12 | H | $3.56 | |
| LTC3624HMSE#PBF | MSOP | 12 | H | $5.00 | $3.50 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC2005A | LTC3624 Demo Board (DFN) | Micropower Sync Buck, 2.7V ≤ VIN ≤ 17V, Vout = 1.2V/1.8V/2.5V/3.3V/5V/Adj @ 2A | $150.00 | |
| DC2359A | LTC3624 Demo Board (MSOP) | Micropower Sync Buck, 2.7V ≤ VIN ≤ 17V, Vout = 1.2V/1.8V/2.5V/3.3V/5V @ 2A | Contact Factory |