wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 24

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

WM8400
Notes
w
DC-DC CONVERTER ELECTRICAL CHARACTERISTICS
1.
2.
3.
4.
Test Conditions
Vin = 3.7V, Vout = 1.8V, T
PARAMETER
DC-DC Converters
Input Voltage
Output Voltage (see notes)
Output Voltage accuracy
(Vin = 3.7V, Vout = 0.85V to 3.4V)
Line regulation
(Vin = 2.7V to 5.5V; Vout = 1.8V)
Load Regulation
Maximum Load Current (see notes)
Quiescent current
Shutdown current
P-channel On Resistance (R
N-channel On Resistance (R
P-channel leakage current
N-channel leakage current
Switching frequency
Vin is the DC-DC converter supply voltage, connected to DC1VDD and DC2VDD for DC1 and DC2 respectively.
In addition to the limits noted above, the maximum output voltage, Vout, is also a function of the input voltage. This is
a function of the P-channel ON Resistance (R
conditions.
DCnLX is the DC-DC converter output pin DC1LX or DC2LX for DC1 and DC2 respectively.
The maximum output current achievable is subject to the current limit of the particular converter being set
appropriately, and also the junction temperature of the device.
A
= 25
DSP
DSN
)
)
o
C unless otherwise stated.
Vin = 3.7V, Output = 100mA
Vin = 3.7V, Output = 100mA
Output current = 1mA to 1A
Hibernate/LDO Mode; 5mA
Hibernate/LDO Mode; 5mA
Vin = 3.7V, DCnLX = GND
Vin = 3.7V, DCnLX = 3.7V
DSP
Hibernate/LDO Mode
Hibernate/LDO Mode
Standby Mode; 0.1A
Standby Mode; 0.1A
TEST CONDITIONS
Active Mode; 0.5A
Active Mode; 0.5A
) and N-channel On Resistance (R
Standby Mode
Standby Mode
Active Mode
Active Mode
0.85
MIN
2.7
DSN
) for the applicable operating
-1.5%, +4.5%
±0.5%
±0.5%
±0.2%
±0.5%
2.048
±4%
±4%
0.01
0.25
TYP
600
600
340
120
0.2
0.1
0.1
60
30
PP, April 2009, Rev 3.0
MAX
5.5
3.4
Pre-Production
UNIT
MHz
mA
mA
mA
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
Ω
Ω
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