L6997S：Step Down Controller for Low Voltage Operations
The device is a high efficient solution for networking dc/dc modules and mobile applications compatible with 3.3V bus and 5V bus.
It's able to regulate an output voltage as low as 0.6V. The constant on time topology assures fast load transient response. The embedded voltage feed-forward provides nearly constant switching frequency operation in spite of a wide input voltage range.
An integrator can be introduced in the control loop to reduce the static output voltage error.
The remote sensing improves the static and dynamic regulation, recovering the wires voltage drop.
Pulse skipping technique reduces power consumption at light loads. Drivers current capability allows output currents in excess of 20A.
Key Features
- OVP,UVP LATCHED PROTECTIONS
- REMOTE SENSING
- POWER GOOD AND OVP SIGNALS
- 600µA TYP QUIESCENT CURRENT
- 94% EFFICIENCY FROM 3.3V TO 2.5V
- PULSE SKIPPING AT LIGTH LOADS
- SELECTABLE SINKING MODE
- 0.6V, ±1% VREF
- FROM 3V TO 5.5V VCC RANGE
- 1V TO 35V INPUT VOLTAGE RANGE
- MINIMUM OUTPUT VOLTAGE AS LOW AS 0.6V
- VERY FAST LOAD TRANSIENTS
- LOSSLESS CURRENT LIMIT, AVAILABLE ALSO IN SINKING MODE
- CONSTANT ON TIME TOPOLOGY
Product Specifications
| Description | Version | Size |
|---|---|---|
| DS3920: Step down controller for low voltage operations | 1.2 | 493 KB |
Brochures
| Description | Version | Size |
|---|---|---|
| Brochure Power management guide | 05.2016 | 4 MB |
Sample & Buy
| Part Number | Package | Packing Type | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|
| L6997STR | TSSOP 20 | Tape And Reel | - | - | NEC | EAR99 | MALAYSIA |
| L6997S | TSSOP 20 | Tube | - | - | NEC | EAR99 | MALAYSIA |
Quality & Reliability
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| L6997STR | TSSOP 20 | Industrial | Ecopack2 | |
| L6997S | TSSOP 20 | Industrial | Ecopack2 |
