LM1771USD/NOPB ACTIVE
Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
Quality information
| RoHS | Yes |
|---|---|
| REACH | Yes |
| Lead finish / Ball material | SN |
| MSL rating / Peak reflow | Level-1-260C-UNLIM |
|
Quality, reliability & packaging information Information included:
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View or download |
More LM1771 information
Packaging information
| Package | Pins | Package qty | Carrier: | Operating temperature range (°C) |
|---|---|---|
| WSON (NGG) | 6 |
1,000 | SMALL T&R
|
-40 to 125 |
| Package | Pins | WSON (NGG) | 6 |
|---|---|
| Package qty | Carrier: |
1,000 | SMALL T&R
|
| Operating temperature range (°C) | -40 to 125 |
Features for the LM1771
- Input Voltage Range of 2.8 V to 5.5 V
- 0.8-V Reference Voltage
- Precision Enable
- No Compensation Required
- Constant Frequency Across Input Range
- Low Quiescent Current of 400 µA
- Internal Soft-Start
- Short Circuit Protection
- 6-Pin WSON Package and 8-Pin VSSOP Package
Description for the LM1771
The LM1771 device is an efficient synchronous buck switching controller with a precision enable requiring no external compensation. The constant ON-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. The precision enable pin allows flexibility in sequencing multiple rails and setting UVLO. The LM1771 also incorporates a unique input feedforward to maintain a constant frequency independent of the input voltage. The LM1771 is optimized for a low-voltage input range of 2.8 V to 5.5 V and can provide an adjustable output as low as 0.8 V. Driving an external high-side PFET and low-side NFET, it can provide efficiencies as high as 95%.
Three versions of the LM1771 are available depending on the switching frequency desired for the application. Nominal switching frequencies are in the range of 100 kHz to 1000 kHz.
Pricing
| Qty | Price (USD) |
|---|---|
| 1-99 | 1.478 |
| 100-249 | 1.221 |
| 250-999 | 0.877 |
| 1,000+ | 0.66 |