WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 90

• Manufacturer Part Number: WM8310GEB/V
• Description: POWER MANAGEMENT SUBSYSTEM, 169BGA
• Manufacturer: Wolfson Microelectronics

Specifications of WM8310GEB/V

• Supply Voltage: 7V
• No. Of Step-down Dc - Dc Converters: 4
• No. Of Ldo Regulators: 11
• Digital Ic Case Style: BGA
• No. Of Pins: 169
• No. Of Regulated Outputs: 13
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

WM8310
15.15 DC-DC CONVERTER OPERATION
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Table 44 PWR_GOOD (GPIO) Configuration
15.15.1 OVERVIEW
The WM8310 provides four DC-DC switching converters. Three of these are Buck (Step-down)
converters; the fourth of these is a Boost (Step-up) converter. The principal characteristics of each
DC-DC converter are shown below.
Table 45 DC-DC Converter Overview
15.15.2 DC-DC STEP DOWN CONVERTERS
DC-DC Converters 1, 2 and 3 are synchronous Buck converters which deliver high performance and
high efficiency across a wide variety of operating conditions.
The high switching frequency, together with the current mode architecture, delivers exceptional
transient performance suitable for supplying processor power domains and similar applications
requiring high stability through fast-changing load (or line) conditions.
The current mode architecture enables extended bandwidth of the control loop, allowing the DC-DC
converter to adapt for changes in input or output conditions more rapidly than can be achieved using
other feedback mechanisms. This improves the converter’s performance under transient load
conditions.
The flexible design of the DC-DC Converters allows a selection of different operating configurations,
which can be chosen according to the performance, efficiency, space or external component cost
requirements.
Converter Type
Input Voltage Range
Output Voltage Range
Load Current Rating
Switching Frequency
ADDRESS
BIT
3
2
1
0
DC-DC1 / DC-DC2
LDO4_OK
LDO3_OK
LDO2_OK
LDO1_OK
2MHz or 4MHz
Up to 1200mA
2.5V to 5.5V
0.6V to 1.8V
Step-down
LABEL
DEFAULT
1
1
1
1
Up to 1000mA
0.85V to 3.4V
2.7V to 5.5V
Step-down
DC-DC3
2MHz
LDO4 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO3 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO2 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
LDO1 status selected as an input to
PWR_GOOD
0 = Disabled
1 = Enabled
PP, December 2009, Rev 3.0
DESCRIPTION
Up to 25mA @ 30V
Up to 40mA @ 20V
2.7V to 5.5V
5V to 30V
DC-DC4
Step-up
1MHz
Pre-Production
90