Model
MASS 2
Version
V_1.0
Prepared by
H/W
Date
22/01/2008
Subject Technical
Manual Page
38/59
II. MT6318 (GSM Power Management System)
The MT6318 is a power management system chip optimized for GSM/GPRS handsets, especially those based on the
MediaTek
MT621x/MT622x system solution. MT6318 contains 11 LDOs, one to power each of the critical GSM/GPRS sub-blocks
Sophisticated controls are available for power-up during battery charging, for the keypad interface, and for the RTC alarm.
The MT6318 is optimized for maximum battery life.
The 2-step RTC LDO design allows the RTC circuit to stay alive without a battery for several hours.
The MT6318 battery charger can be used with a lithium-ion (Li+) battery.
The SIM interface provides the level shift between SIM card and microprocessor.
The MT6318 is available in a 96-pin TFBGA package.
The operating temperature range is -25°C to +85°C.
The interface Features are listed below.
- Handles all GSM/GPRS Baseband Power Management
- Input range: 2.8 V ~ 5.0 V
- Charger input of up to 15 V
- 11 LDOs optimized for specific GSM/GPRS subsystems
- 2-step RTC LDO
- 600 mW Class AB audio amplifier
- Booster for series backlight LED driver
- Charge pump for parallel backlight LED driver
- SPI interface
- Pre-charge indication
- Li-ion battery charge function
- SIM card interface
- RGB LED driver
- V
core
for power-saver mode
- Over-current and thermal overload protection
- Programmable under voltage lockout protection
- Power-on reset and start-up timer
- 96-pin TFBGA package
Содержание MASS2
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