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Reliability Data
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- SnPb (Tin-Lead) BGA Packages μModule Power Products
- μModule Power Products Catalog
- μModule Regulators for Analog Devices’ Processors and DSPs
Press Release
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Features
- Quad Output Step-Down μModule® Regulator with 4A per Output
- Wide Input Voltage Range: 4V to 14V
- 2.375V to 14V with External Bias
- 0.6V to 5.5V Output Voltage
- 4A DC, 5A Peak Output Current Each Channel
- Up to 5.5W Power Dissipation (TA = 60°C, 200 LFM, No Heat Sink)
- ±1.5% Total Output Voltage Regulation
- Current Mode Control, Fast Transient Response
- Parallelable for Higher Output Current
- Output Voltage Tracking
- Internal Temperature Sensing Diode Output
- External Frequency Synchronization
- Overvoltage, Current and Temperature Protection
- 9mm × 15mm × 5.01mm BGA Package
Typical Application
Description
The LTM®4644/LTM4644-1 is a quad DC/DC step-down μModule (micromodule) regulator with 4A per output. Outputs can be paralleled in an array for up to 16A capability. Included in the package are the switching controllers, power FETs, inductors and support components. Operating over an input voltage range of 4V to 14V or 2.375V to 14V with an external bias supply, the LTM4644/LTM4644-1 supports an output voltage range of 0.6V to 5.5V. Its high efficiency design delivers 4A continuous (5A peak) output current per channel. Only bulk input and output capacitors are needed.
15mm × 9mm × 5.01mm BGA
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTM4644EY#PBF | BGA | 77 | E | $32.64 | $22.85 |
| LTM4644IY#PBF | BGA | 77 | I | $35.91 | $25.14 |
| LTM4644IY | BGA | 77 | I | $44.70 | $31.30 |
| LTM4644MPY | BGA | 77 | MP | $73.44 | $51.41 |
| LTM4644MPY#PBF | BGA | 77 | MP | $64.64 | $45.25 |
| LTM4644IY-1#PBF | BGA | 77 | I | $35.91 | $25.14 |
| LTM4644EY-1#PBF | BGA | 77 | E | $32.64 | $22.85 |
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 |
|---|---|---|---|
| DC1900A | LTM4644 Demo Board | Quad Buck µModule Regulator, 4V ≤ VIN ≤ 14V, Vout1 - Vout4 = 3.3V/2.5V/1.5V/1.2V @ 4A Each | $65.00 | |
| DC2428A | LTC2975 Demo Board Set | LTM4644 Quad 4A Power Supply Management (includes DC2382A + DC2363A) [requires DC1613] | $200.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1613A | USB-to-PMBus Controller for Use with LTpowerPlay | $50.00 | |
| DC2026C | Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform | $75.00 |