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LTC4057ES5-4.2
LTC4057ES5-4.2 - Brand New Analog Devices / Linear Technology Battery Management ICs
Credit Card - One-month free return and one year warranty.
- Full or Partial Refund, if the item is not as described
- Full Refund if you don't receive your order
DESCRIPTION
The LTC®4057 is a constant-current/constant-voltage linear charger for single-
cell lithium-ion batteries. Its ThinSOT TM package and low external
component count make the LTC4057 especially well suited for portable
applications. Furthermore, the LTC4057 is specifically designed to work within
USB power specifications.
No external sense resistor is needed and no blocking diode is required due to
the internal MOSFET architecture. Thermal feedback prevents overheating by
regulating the charge current to limit the die temperature during high power
operation or high ambient temperature conditions.
The charge voltage is preset at 4.2V and the charge current can be programmed
externally with a single resistor.
FEATURES
■ Programmable Charge Current up to 800mA
■ No External MOSFET, Sense Resistor or Blocking Diode Required
■ Constant-Current/Constant-Voltage Operation with Thermal Regulation
Maximizes Charge Rate Without Risk of Overheating*
■ Charges Single Cell Li-Ion Batteries Directly from USB Port
■ Preset 4.2V Charge Voltage with ±1% Accuracy
■ Current Monitor Pin for Charge Termination
■ 25µA Supply Current in Shutdown Mode
■ Low Battery Charge Conditioning (Trickle Charging)
■ Soft-Start Limits Inrush Current
■ Available in a Low Profile (1mm) SOT-23 Package
APPLICATION
■ Wireless PDAs
■ Cellular Phones
■ Portable Electronics
Shipping
| First item | Additional item | Service | Description |
|---|---|---|---|
| $0.00 | Free | Free Shipping | Estimated 15-30 business days via Registered Air Mail or others |
| $27.50 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
| $0.00 | Free | Buyer cooperating carrier | Using buyer's cooperating carrier. Buyer should create a shipping label and share it to us. And then we will call carrier for pickup |
| $38.00 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
Delivery
- The transportation time may be delayed due to customs clearance, local holidays or abnormal events.
- The estimated time is based on the fastest speed provided by commercial couriers (DHL, FedEx, UPS etc).
- The estimated time does not include the lead time of the item. The lead time of most items is 2–5 business days. If more than 5 working days are needed, we will manually confirm with you.
| Flag | Country | Express Delivery | Standard Delivery |
|---|---|---|---|
 | United States | 3 - 5 days | 10-15 days |
 | Canada | 3 - 5 days | 10-20 days |
 | Mexico | 3 - 5 days | 10-17 days |
 | Germany | 3 - 5 days | 10-12 days |
 | Italy | 3 - 5 days | 10-15 days |
 | United Kingdom | 3 - 5 days | 10-12 days |
Estimated Delivery
This item requires 2-5 business days for processing before shipping after payment is confirmed. And depending on the destination and shipping method.
Return Policy
| Return window | Refund type | Return shipping |
|---|---|---|
| 60 days after receiving item | Money Back or Replacement | Buyer pays for return shipping |
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