Management Unit. AT73C246 Datasheet

AT73C246 Datasheet PDF, Equivalent


Part Number

AT73C246

Description

Power Management Unit

Manufacture

ATMEL Corporation

Total Page 30 Pages
PDF Download
Download AT73C246 Datasheet PDF


AT73C246 Datasheet
Features
AUDIO CODEC
– 100dB Dynamic Range Stereo Audio DAC - 8 to 96 kHz sampling frequency
– 96dB Dynamic Range Stereo Audio ADC - 8 to 96 kHz sampling frequency
– 16 / 32 Ohms headset amplifier with capless operation
• SNR: 97 dB A-Weighted
• THD: -60 dB (16Ohms / 20mW / 3.3V supply)
• Maximum output power: 55mW (16Ohms / 3.3V supply)
– Stereo line inputs, stereo auxiliary inputs
– Stereo microphone inputs with bias generator for electret device
– Low power Analog Bypass mode (Line / Aux in to Headset Out)
– Low power Analog sidetone mode (Microphone in to Headset Out)
– Automatic Audio path control with smooth fade in / fade out operation
– I2S port
• Master / Slave Operation
• I2S / Left / Right justified modes
• 16 / 18 / 20 / 24 bit operation
6x SUPPLY CHANNEL VOLTAGE REGULATORS
– DCDC0:
• 1.85V - 600mA. 0.8 to 3.6V / 50mV step.
• 2 MHz switching buck regulator
• Fast load transient response - PWM / PFM modes.
• Efficiency up to 92%
– DCDC1:
• 1.2V - 600mA. 0.8 to 3.6V / 50mV step.
• 2 MHz switching buck regulator
• Fast load transient response - PWM / PFM modes.
• Efficiency up to 90%
– LDO2: 1V - 300mA. 0.8 to 1.35V / 50mV step - Fast transient response
– LDO3: 3.3V - 200mA. 2.7 to 3.6V / 50mV step - Fast transient response
– LDO4: 3.3V - 200mA. 2.7 to 3.6V / 50mV step - Audio codec supply
– LDO5: 2.5V - 10mA - Backup battery charger and RTC supply
LOW CONSUMPTION POWER MANAGER
– 2.5V - 5.5V VIN Operation
– 20uA typical consumption OFF mode
– VIN monitor, CPU supplies monitor
– Die temperatue and over-current protections
– Reset and Interrupt generation
– Automatic Voltage Ramping on supply channels for DVS applications
– Standby mode with selectable supplies OFF
RTC
– Ultra Low power crystal oscillator (<1uA typ.)
– Wake up function with programmable alarm or selectable inputs
10-b / 300kS/s ADC with 4 external / 6 int\ernal selectable inputs
Two-Wire Interface for PMU and Audio controls
Available in 7.5 x 7.5 x 0.9 mm 64-pin QFN Package
Applications: Multimedia, Audio + Supply solution for MPU+DDR2 designs.
www.DataSheet4U.com
Power
Management
and Analog
Companions
(PMAAC)
AT73C246
6 Supply
Channel PMU
With Audio
Codec
11050A–PMAAC–07-Apr-10

AT73C246 Datasheet
www.DataSheet4U.com
1. Description
The AT73C246 is an integrated high performance Power Management and Audio IC. It is specif-
ically designed for advanced technology application processors with complex and low voltage
supplies targeting audio applications from low to high end. This System-on-Chip allows signifi-
cant savings in both cost and board area over previous discrete solutions.
Directly operated from a 2.9V to 5.5V input voltage, the PMU generates a set of 4 regulated
power supplies and an associated delayed reset signal. These 4 voltages are built up with 2 high
efficiency DCDC buck converters and 2 low noise LDOs. Featuring ultra fast transient responses
and integrating automatic voltage scaling function, these supplies perfectly fit with modern low
voltage MCU cores and memory supplies (DDR, Flash, ...). An additional 200mA LDO under
software control is provided for auxiliary application functions. The high performances of this
LDO (high PSRR, low noise, fast transient response) makes it ideal for analog front-ends (Audio,
RF...) as well digital peripherals.
Aside from the PMU, the AT73C246 integrates a complete state-of-the art low power audio
codec with headphone amplifier. On the input side, a stereo microphone preamplifier with differ-
ential or single ended connection (MICDIFF / MIC) and 2 selectable stereo inputs (LINE / AUX)
are directed to a 96dB Dynamic Range stereo audio ADC through an input mixer. On the output
side a 100dB dynamic range stereo audio DAC drives, through an output mixer, a 60 mW stereo
headphone amplifier which comes along with a VCM buffer. This VCM buffer allows to save two
large on-board coupling capacitors for area constrained applications. Additionally two fully ana-
log paths called bypass and sidetone from line / aux and microphone inputs to headphone
outputs allow to reduce the audio power consumption to minimum when needed.
The PMU is complemented with a low power RTC system including a recharging LDO, a crystal
oscillator and a programmable alarm that is fully integrated in the PMU digital core. Thus, the
RTC function is able to wake up the PMU, i.e the regulated power supplies, at a programmed
instant.
Also, a 10-bit ADC equipped with a 10:1 analog multiplexer is provided to the application to per-
form voltage measurements.
Finally, to reduce power consumption to minimum, the PMU features a flexible STANDBY mode
where the MCU is placed in reset state with selectable supplies ON, OFF or in low-power mode.
Power consumption in OFF mode is typically 20uA.
2 AT73C246
11050A–PMAAC–07-Apr-10


Features Datasheet pdf www.DataSheet4U.com Features • AUDIO CODEC – 100dB Dynamic Range Stereo Au dio DAC - 8 to 96 kHz sampling frequenc y – 96dB Dynamic Range Stereo Audio A DC - 8 to 96 kHz sampling frequency – 16 / 32 Ohms headset amplifier with ca pless operation • SNR: 97 dB A-Weight ed • THD: -60 dB (16Ohms / 20mW / 3.3 V supply) • Maximum output power: 55m W (16Ohms / 3.3V supply) – Stereo lin e inputs, stereo auxiliary inputs – S tereo microphone inputs with bias gener ator for electret device – Low power Analog Bypass mode (Line / Aux in to He adset Out) – Low power Analog sideton e mode (Microphone in to Headset Out) Automatic Audio path control with sm ooth fade in / fade out operation – I 2S port • Master / Slave Operation I2S / Left / Right justified modes 16 / 18 / 20 / 24 bit operation 6x SU PPLY CHANNEL VOLTAGE REGULATORS – DCD C0: • 1.85V - 600mA. 0.8 to 3.6V / 50 mV step. • 2 MHz switching buck regul ator • Fast load transient response - PWM / PFM modes. • Efficiency up to 92% – DCDC1: • 1.2V - 600mA.
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