PMB6821 Datasheet, PDF (1/2 Pages) Infineon Technologies AG – SM-Power3 - Highly Integrated Power Management Units for Feature Rich Mobile Devices

Product Brief
PMB 6821
SM-Power3 - Highly Integrated Power Management
Units for Feature Rich Mobile Devices
S M - P O W E R 3 extends the SM-Power family with a new highly
integrated power management IC. It is optimized to support mobile devices
based upon S-Gold3 and S-Gold3H, with features ranging from EDGE up to 3G
and HSDPA.
S M - P O W E R 3 is designed for mobile systems composed of digital or
mixed signal baseband ICs, analog components, RF transceiver ICs, LCD/TFT
graphic displays with backlight, camera, loudspeaker, and USB interface.
S M - P O W E R 3 also supports charging for mobile rechargeable
batteries like Li-Ion or Li-Polymer. It provides the different supply voltages for
the system using highly efficient DC/DC buck and boost converters and linear
low-dropout regulators (LDO’s).
I N A D D I T I O N , the SM-Power3 generates a power on reset, stand-by
voltages, and supports various low power modes.
T H E S M - P O W E R 3 provides all functions needed for the system
power management with a minimized bill of material and size of external
components.
Features
■ General
– Software-controlled charging of Lithium-Ion or Li-Polymer batteries
– Different low-power modes with very low power consumption
– Temperature monitoring with built-in over-temperature warning
■ Switching converters
– SD1: Fully integrated high-efficiency step-down converter with dynamic
output voltage scaling and PFM low-power mode
– SD2: Fully integrated high-efficiency step-down converter with PFM
low-power mode
– SU1: 5.6 … 25 V Step-up converter driving white LED for backlight and
flashlight
■ Linear Low-Dropout (LDO) regulators
– 7 General-Purpose LDO’s
– 5 Low-Noise LDO’s
– 3 low-power LDO’s
■ LED Control
– 3x PWM-modulated control signal
– Driver for white LEDs, e.g. for flashlight
– Support for LEDs connected in series
– Support for trickle charging LED and indicator LED
■ Charger Section
– Fast charging
– Constant-current charging (active trickle-charge mode)
– Pre-charge for deeply discharged batteries
(trickle-charge mode)
– Charging through USB
– Charging with up to 10 V charger voltage
– Withstands charger voltages up to 15 V
■ Motor Driver
– Single ended linear controlled vibrator motor driver
– Optionally PWM controlled
■ USB Transceiver 2.0
– USB 2.0 transceiver
– Integrated pull-up/pull-down resistors
■ Audio Amplifier
– Battery-driven 700 mW differential audio amplifier
capable of driving 8 Ω loudspeakers
– Two gain stages including overdrive for ringing
tones. PSRR @ 4 kHz > 90 dB.
– Low-power consumption
■ Interfaces
– I²C control interface for device configuration
– Hardware-controlled LDO and SD1 voltage setting
– Power-On reset generation. Interrupt (event) line
for indication of status change.
– Digital interface to USB transceiver and RS232
serial interface
■ Control Unit
– Pulse width modulated (PWM) LED driver for
dimmed light. On/off switch.
– Over-temperature warning
– State machine to control System Start-Up
– Under-voltage shutdown with defined system
behaviour
– Charger detection
– Detection of battery insertion/removal
– Independent LDO control (switch on/off, standby)
– Voltages programmable by software and hardware
– ID registers
– System watchdog timer
– On-chip oscillator
■ Package
– Ultra-thin PG-WFSGA 121 (7 × 7 × 0.8 mm)
■ Evaluation kits
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