The LP3990 regulator is designed to meet the requirements of portable, battery-powered systems providing an accurate output voltage, low-noise, and low-quiescent current. The LP3990 will provide a 0.8-V output from the low input voltage of 2 V at up to a 150-mA load current. When switched into shutdown mode via a logic signal at the enable pin (EN), the power consumption is reduced to virtually zero.
The LP3990 is designed to be stable with space-saving ceramic capacitors with values as low as 1 µF.
Performance is specified for a –40°C to 125°C junction temperature range.
For output voltages other than 0.8 V, 1.2 V, 1.35 V, 1.5 V, 1.8 V, 2.5 V, 2.8 V, or 3.3 V, please contact the Texas Instruments sales office.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LP3990 | DSBGA (4) | 1.324 mm x 1.045 mm (MAX) |
WSON (6) | 2.90 mm x 1.60 mm | |
SOT-23 (5) | 3.00 mm x 3.00 mm |
Changes from I Revision (May 2013) to J Revision
PIN | I/O | DESCRIPTION | |||
---|---|---|---|---|---|
NAME | DSBGA | SOT-23 | WSON | ||
YZR | DBV | NGG | |||
GND | A1 | 2 | 2 | — | Common Ground. |
EN | A2 | 3 | 5 | I | Enable Input; Enables the Regulator when ≥ 0.95 V. Disables the Regulator when ≤ 0.4 V. Enable Input has 1-MΩ (typical) pull-down resistor to GND. |
OUT | B1 | 5 | 1 | O | Voltage output. A 1-µF Low ESR Capacitor should be connected to this Pin. Connect this output to the load circuit. |
IN | B2 | 1 | 6 | I | Voltage supply Input. A 1-µF capacitor should be connected at this input. |
N/A | 4 | 3 | I | No internal connection. | |
N/C | N/A | 4 | I | No internal connection. | |
N/C | Pad | — | Thermal pad. Connect to Pin 2. |