Order this document by MC33128/D
Power Management Controller
The MC33128 is a power management controller specifically ...
Order this document by MC33128/D
Power Management Controller
The MC33128 is a power management controller specifically designed for use in battery powered cellular telephone and pager applications. This device contains all of the active functions required to interface the user to the system electronics via a microprocessor. This integrated circuit consists of a low dropout voltage
regulator with power–up reset for MPU power, two low dropout voltage
regulators for independant powering of analog and digital circuitry, and a negative charge pump voltage
regulator for full depletion of gallium arsenide MESFETs. Also included are protective system shutdown features consisting of a battery latch that is activated upon battery insertion, low battery voltage shutdown, and a thermal over temperature detector. This device is available in a 16–pin narrow body surface mount plastic package. Three Positive Regulated Outputs Featuring Low Dropout Voltage
MC33128
POWER MANAGEMENT CONTROLLER
SEMICONDUCTOR TECHNICAL DATA
Negative Regulated Output for Full Depletion of GaAs MESFETs MPU Power Up Reset Battery Latch Low Battery Shutdown Pinned–Out Reference for MPU A/D Converter Low Start–Up and Operating Current Thermal Protection
D SUFFIX PLASTIC PACKAGE CASE 751B (SO–16)
16 1
Simplified Block Diagram
VCC 16 + 11 10 9 VBB CPC 3 2 Charge Pump 7 Control Logic Negative Standby
Regulator Standby
Regulator 1 Standby
Regulator 2 MPU
Regulator MPU Power Up Reset Gnd 6 12 Referenc...