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L4977A
L4977A - Brand New STMicroelectronics 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
DESCRIPTION
The L4977A is a stepdown monolithic power switching regulator delivering 7A at
a voltage variable from 5.1 to 40V.
Realized with BCD mixed technology, the device uses a DMOS output transistor
to obtain very high efficiency and very fast switching times. Features of the
L4977A include reset and power fail for microprocessors, feed forward line
regulation, soft start, limiting current and thermal protection. The device is
mounted in a 15-lead multiwatt plastic power package and requires few external
components. Efficient operation at switching frequencies up to 500KHz allows
reduction in the size and cost of external filter components.
■ 7A OUTPUT CURRENT
■ 5.1V TO 40V OUTPUT VOLTAGE RANGE
■ 0 TO 90% DUTY CYCLE RANGE
■ INTERNAL FEED-FORWARD LINE REGULATION
■ INTERNAL CURRENT LIMITING
■ PRECISE 5.1V ± 2% ON CHIP REFERENCE
■ RESET AND POWER FAIL FUNCTIONS
■ SOFT START
■ INPUT/OUTPUT SYNC PIN
■ UNDER VOLTAGE LOCK OUT WITH HYS TERETIC TURN-ON
■ PWM LATCH FOR SINGLE PULSE PER PERIOD
■ VERY HIGH EFFICIENCY
■ SWITCHING FREQUENCY UP TO 500KHz
■ THERMAL SHUTDOWN
■ CONTINUOUS MODE OPERATION
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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