LM2787

If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage (VIN to GND or GNDto OUT) .........................+ 5.8V
SD........................................................ (GND − 0.3V)to(V_IN + 0.3V)
V_NEG and V_OUT Continuous OutputCurrent........................... 10mA
VOUT Short-Circuit Duration to GND
(Note 2) ..................................................................................1 sec.
Continuous Power Dissipation (T_A =25°C) (Note 3) ............600mW
T_JMAX (Note 3) ......................................................................150°C
_JA (Note 3) ......................................................................220°C/W
Operating Input Voltage Range ....................................2.7V to 5.5V
Operating Output Current Range ................................0mA to 10mA
Operating Ambient................................................. −40°C to 85°C
Temp. Range
Operating Junction Temp. Range ..........................−40°C to 110°C
Storage Temperature............................................ −65°C to 150°C
Lead Temp. (Soldering, 10 sec.) .............................................300°C
ESD Rating (Note 4) ....................................................................2kV

The LM2787 CMOS Negative Regulated Switched Capacitor Voltage Inverter delivers a very low noise adjustable output for an input voltage in the range of +2.7V to +5.5V. Four low cost capacitors are used in this circuit to provide up to 10mA of output current. The regulated output for the LM2787 is adjustable between −1.5V and −5.2V. The LM2787 operates at 260 kHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 400 A (charge pump power efficiency greater than 90% with most loads) and 0.05 A typical shutdown current,the LM2787 provides ideal performance for cellular phone power amplifier bias and other low current, low noise negative voltage needs. The device comes in a small 8-Bump micro SMD package.