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DA6021 Datasheet(PDF) 84 Page - Renesas Technology Corp

Part # DA6021
Description  HIGHLY INTEGRATED POWER MANAGEMENT IC FOR INTEL® ATOM™ Z3000 PROCESSOR
PDF  225 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

DA6021 Datasheet(HTML) 84 Page - Renesas Technology Corp

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DA6021
HIGHLY INTEGRATED POWER MANAGEMENT IC FOR
INTEL® ATOM™ Z3000 PROCESSOR
Company Confidential
Data Sheet
Version 3.A - Final
31-Jan-14
© 2014 Dialog Semiconductor GmbH
84 of 224
www.dialog-semiconductor.com
DC/DC Buck Regulator V1P0A
11.6.3
The high efficiency buck regulator supplies the USB sus, clock, CFIO and the V1P0S power rails of the SoC.
This power rail is also capable of supplying the pass device of the push pull source for the DDR3 address line
termination.
Figure 32: V1P0A Power Rail Block Diagram
To allow for voltage drops on the PCB it is possible to program the output voltage to either 1.01V or 1.05V, see
register below.
The maximum output current of the 1P0A buck regulator is 1900mA
11.6.3.1
Power States
Active State:
DA6021 V1P0A voltage rail can handle up to 1.9A. Even though the average current is in the range of 50mA to
350mA. Optimized efficiency is achieved from 50mA to 500mA. Automatically switching from PWM to PFM mode
achieves the best power efficiency.
S0ix State:
When the SoC enters the S0ix state, SLP_S0ix is held low. DA6021 turns the V1P0A buck regulator into low
power mode and disables all un-necessary blocks, reducing the power requirements. DA6021 exits this power
saving mode within 5µs after SoC asserts the SLP_S0ix signal to high.
Typical current requirements for S0ix mode are 5mA .. 30mA, this power saving mode supports up to 200mA
maximum current without catastrophic failures.
S3 & S4 State:
In S3 or S4 state the average current of V1P0A is expected to be ~2.6mA and the buck converter is in low power
mode.
BUCK_V1P0A
1.01V
1.9A
V1P0A bus
V1P0A_FBP
V1P0A_FBN
V1P0A_VIN
2
C
V1P0A_GND
2
2
0.47µH
LX
C
V1P0S bus
V1P0S_EN
V1P0S_FB
EXT_SW_V1P0S
V1P0SX bus
V1P0SX_EN
V1P0SX_FB
EXT_SW_V1P0SX
VDDQ_VTT bus
VDDQ_VTT_VIN
VDDQ_VTT_R
LDO_VDDQ_VTT
VDDQ_VTT_GND
VDDQ_VTT
C
C



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