FM4057S52
Linear Charging IC Lithium-ion SOT-23-5
Single-cell lithium battery linear charging chip with a withstand voltage of 32V
- Manufacturer
- FM
- Manufacturer part #
- FM4057S52
- Store part #
- C841288
- Package / case
- SOT-23-5
- Category
- Battery Management
- Packaging
- Tape & Reel (TR)
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement · policy
31,565 in stock
#C841288
Stock & price checked 6 days ago
| Quantity | Unit price | Pack price |
|---|---|---|
| 5+ | ₹7.89 | ₹39.45 |
| 50+ | ₹6.92 | ₹346.00 |
| 150+ | ₹6.43 | ₹964.50 |
| 500+ | ₹6.06 | ₹3,030.00 |
| 3,000+ | ₹5.77 | ₹17,310.00 |
| 6,000+ | ₹5.62 | ₹33,720.00 |
5 × ₹7.89
₹39.45
excl. GST
₹46.55 incl. 18% GST
- Dispatch in 7–10 working days
- GST invoice with every order
- Standard pack: 3,000 per reel
FM4057S52
₹39.45 for 5 + GST
Specifications
- Operating Temperature
- -40℃~+85℃
- Quiescent Current
- 0uA
- Type of Battery
- Lithium Battery
- Operating Voltage
- 4.6V~32V
- The Chip Type
- Charging IC
- Charge Current - Max
- 1A
Packaging & compliance
- RoHS
- ROHS Compliant
- Lifecycle
- Active
- Packaging
- Tape & Reel (TR)
- Standard pack
- 3,000 / Reel
- Sold per
- Piece
- Minimum order
- 5 (multiples of 5)
- Unit weight
- 0.036 g
Overview
FM4057 is a single-cell lithium battery linear charger IC combining high integration with high reliability, accepting input power from either an AC adapter or a USB port. When the power source is removed, FM4057 enters sleep mode. The FM4057 charging system integrates three control loops — constant current, constant voltage, and constant temperature — delivering superior charging performance. FM4057 optimizes the charging process through a control algorithm encompassing pre-charge, fast-charge, and constant-voltage modes. Once fully charged, the device maintains constant-voltage mode to ensure the battery remains at full charge at all times. Charge current is programmable via a single external resistor, with a maximum configurable charge current of 1A. An internal thermal feedback circuit regulates die temperature to ensure the battery is charged at the optimal rate across all available ambient temperatures. In practice, when charging begins, the die temperature rises, causing the charge current to decrease proportionally with the temperature increase; once the internal temperature loop reaches steady state, the charge current stabilizes, achieving isothermal charging. The VIN pin supports a maximum input voltage of 32V. FM4057 also integrates comprehensive protection features: input overvoltage, input undervoltage, output overvoltage, output short-circuit, and over-temperature protection. FM4057 is available in four package options: SOT23-6, SOT23-5, ESOP8, and DFN6.
Applications
- Single-cell lithium battery charging
Key features
- Input voltage range: 4.6V~32V
- Input overvoltage protection
- FM4057 overvoltage protection voltage: 6.5V
- FM4057B supports high-voltage charging
- External resistor-adjustable charge current, up to 1A
- Constant-temperature charging with automatic current adjustment on over-temperature
- Supports 4.2V, 4.35V, 4.4V battery types
- LED charge status indication, dual-color LED support
- Built-in MOSFET with reverse current blocking
- Trickle/CC/CV output overcurrent, overvoltage, and short-circuit protection
- Input overvoltage and undervoltage protection
- OTP thermal protection
- 4KV ESD
Alternatives
Similar parts — check the datasheet before substituting.
Same category
