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Design Note
- DN450 - Supercapacitors Can Replace a Backup Battery for Power Ride-Through Applications
- DN485 - Complete Energy Utilization Improves Run Time of a Supercap Ride-Through Application by 40%
Reliability Data
Product Selector Card
Press Release
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Features
- Designed Specifically to Drive Large and Small QG PFETs
- Very Low Loss Replacement for Power Supply OR’ing Diodes
- Wide Operating Voltage Range: 3.6V to 36V
- –40°C to 125°C Operating Temperature Range
- Reverse Battery Protection
- Automatic Switching Between DC Sources
- Low Quiescent Current: 35μA per Channel
- Load Current Sharing
- MOSFET Gate Protection Clamp
- Precision Input Control Comparators for Setting Switchover Threshold Points
- Open-Drain Feedback Points for Customer Specified Hysteresis Control
- Minimal External Components
- Space Saving 10-Lead MSOP Package
Typical Application
Description
The LTC4416/LTC4416-1 control two sets of external P-channel MOSFETs to create two near ideal diode functions for power switchover circuits. This permits highly effi cient OR’ing of multiple power sources for extended battery life and low self heating. When conducting, the voltage drop across the MOSFET is typically 25mV. For applications with a wall adapter or other auxiliary power source, the load is automatically disconnected from the battery when the auxiliary source is connected.The LTC4416 integrates two interconnected PowerPath controllers with soft switchover control. The “soft-off” switchover permits the users to transfer between two dissimilar voltages without excessive voltage undershoot (or VDROOP) in the output supply. The LTC4416/LTC4416-1 also contain a “fast-on” feature that dramatically increases gate drive current when the forward input voltage exceeds 25mV. The LTC4416 “fast off” feature is engaged when the sense voltage exceeds the input voltage by 25mV. The LTC4416-1 enables the fast off under the same conditions and when the other external P-channel device is selected using the enable pins.
The wide operating supply range supports operation from one to eight Li-Ion cells in series. The low quiescent current (35μA per channel) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.
The LTC4416/LTC4416-1 are available in low profi le 10-lead MSOP packages.
MS-10
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC4416EMS#PBF | MSOP | 10 | E | $3.78 | $2.45 |
| LTC4416EMS#TRPBF | MSOP | 10 | E | $2.51 | |
| LTC4416EMS-1#PBF | MSOP | 10 | E | $3.78 | $2.45 |
| LTC4416EMS-1#TRPBF | MSOP | 10 | E | $2.51 | |
| LTC4416IMS#PBF | MSOP | 10 | I | $4.56 | $2.95 |
| LTC4416IMS#TRPBF | MSOP | 10 | I | $3.01 | |
| LTC4416IMS-1#PBF | MSOP | 10 | I | $4.56 | $2.95 |
| LTC4416IMS-1#TRPBF | MSOP | 10 | I | $3.01 | |
| LTC4416IMS-1 | MSOP | 10 | I | $9.12 | $5.90 |
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 |
|---|---|---|---|
| DC1059A | LTC4416EMS Demo Board | Dual PowerPath Controller | $100.00 |