LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4 PMIC Functional Block Diagram (U3000 : PM6658-3P)
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Input power management
- Valid external supply attachment and removal detection
- Supports unregulated (closed-loop) external charger supplies and USB supplies as input power
sources
- Supports lithium-ion main batteries
- Trickle, constant current, constant voltage, and pulsed charging of the main battery
- Supports coin cell backup battery (including charging)
- Battery voltage detectors with programmable thresholds
- VDD collapse protection
- Charger current regulation and real-time monitoring for over-current protection
- Charger transistor protection by power limit control
- Control drivers for the internal pass transistors and one (optional) external battery MOSFET
- Voltage, current, and power control loops
- Automated recovery from sudden momentary power loss
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Output voltage regulation
- One boost (step-up) switched-mode power supply (SMPS) that generates the +5 output for USB-
OTG host mode, for powering the speaker driver to achieve 1 W audio output level, and for driving
a camera flash
- Three buck (step-down) switched-mode power supplies that efficiently generate the MSM core
voltage (VREG_MSMC) and two general purpose supplies (S2 and S3)
- External controls (OPT_1 and OPT_2) establish the VREG_MSMC default voltage as 1.200 or
1.375 V (to match the MSM device requirements) and determine whether the S3 SMPS is enabled
or not upon power-up
- Supports dynamic voltage scaling (DVS) for the VREG_MSMC output
- Fifteen low-dropout linear regulator circuits with programmable output voltages, implemented using
three different current ratings:
- Six at 300 mA: MSMA, MSMP, RFRX1, RFTX, RFUBM, and GP3
- Seven at 150 mA: MMC, MSME, RFRX2, RUIM, WLAN, GP1, and GP2
- Two at 50 mA: TCXO and USB
- All regulators can be individually enabled/disabled for power savings
- Low power mode available on most regulators
- All regulated outputs are derived from a common reference - close tracking
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