M
ODEL
SDP100 V
ERSION
V_1.00
P
REPARED BY
H/W
D
ATE
25/05/2007
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
49/70
II. MT6305BN (GSM Power Management System)
The MT6305BN is a power management system chip optimized for GSM handsets, especially those based on the MediaTek
MT622x system solution. It contains seven LDOs, one to power each of the critical GSM sub-blocks. Sophisticated controls
are available for power-up during battery charging, keypad interface, and RTC alarm. The MT6305BNBN is optimized for
maxi-mum battery life, featuring a ground current of only 107µA and 187µA when the phone is in standby and operation
respectively. The MT6305BNBN battery charger can be used with lithium ion (Li+) and nickel metal hydride (NiMH)
batteries. The MT6305BNBN contains three open-drain output switches for LED, alerter and vibrator control. The SIM
interface provides the level shift between SIM card and microprocessor. The MT6305BNBN is available in 48-pin QFN
package. The operating temperature range is from -25°C to +85°C. The interface Features are listed below.
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Handles all GSM baseband Power management
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2.8V to 5.5V input range
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Charger input up to 15V
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Seven LDOs Optimized for specific GSM Subsystems
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High Operation Efficiency and Low Stand-by Current
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Li-Ion and NiMH battery Charge function
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SIM Card interface
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Three Open-Drain Output Switches to Control the LED, Alerter and vibrator
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Thermal Overload Protection
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Under Voltage Lock-Out Protection
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Over Voltage Protection
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Power on Reset And start up Timer
Figure 39. MT6305BN Pin configuration.
SDP100
T
ECHNICAL
M
ANUAL
Page 3.49