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MAX1687EUE+T
MAX1687EUE+T - Brand New Maxim Integrated DC Switching Regulators
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
General Description
The MAX1687/MAX1688 step-up DC-DC converters deliver up to 2W from a single
Li-Ion or three NiMH cells. The devices are ideal for burst-load applications
such as GSM cell phones and wireless LANs, where the RF power amplifiers
require short, high current bursts. The MAX1687/MAX1688 reduce battery surge
current by slow ly charging a reservoir capacitor, which supplies the
necessary peak energy for the load current burst. As a result, the peak
battery current is limited, thus maximizing battery life and minimizing
battery voltage sag and transient dips.
An internal synchronous rectifier provides over 90% conversion efficiency and
eliminates the need for an external Schottky diode. A logic shutdown mode
reduces the shutdown current to only 3µA. The devices can be disabled during
current bursts (RF transmit mode) to eliminate
switching noise. The switching frequency of the MAX1687/MAX1688, controlled by
the selected inductor, can exceed 1MHz. Two external resistors set the output
voltage from 1.25V to 6V. The MAX1687 controls peak battery current, while the
MAX1688 features a more advanced, adaptive constant recharge-time algorithm
that maximizes battery life. The MAX1687/MAX1688 are available in thin 16-pin
TSSOP (1.1mm max height) or standard 8-pin SO packages.
Features
♦ Low 450mA Peak Battery Current
Provides 2A, 5V GSM Burst
♦ 90% Efficiency
♦ Internal Power MOSFETs and Current-Sense Resistor
♦ Output Disconnects from Input During Shutdown
♦ 3µA Shutdown Current
♦ Precise Voltage-Controlled Current Limit (MAX1687)
♦ Adaptive Constant-Recharge-Time Capability (MAX1688)
♦ 1.25V to 6V Adjustable Output
♦ 2.7V to 6V Input Range
(1 Li-Ion cell or 3 NiMH cells)
♦ Switching Frequency Can Exceed 1MHz
♦ Standby Mode Disables DC-DC During Transmission Burst
♦ Low Inrush Current at Start-Up
Applications
GSM Phones
Wireless Handsets
PC Cards (PCMCIA)
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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