Production Data
WM8352
7.3 DC-DC STEP DOWN CONVERTER ELECTRICAL CHARACTERISTICS
Test Conditions
VIN = 3.7, VOUT = 1.8V, TA = +25ºC unless otherwise noted.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC-DC1 and DC-DC6
Input Voltage
VIN
2.7
3.7
5.5
3.4
V
V
Output Voltage
VOUT Accuracy
VOUT
VOUT
0.85
VIN = 3.7V
IOUT
0.5A
=
Active
Sleep
+/- 3.0
%
VOUT = 0.85V / 1.8V
/ 3.4V
-1.5
IOUT
0.005A
=
+4.5
Line Regulation
VIN = 2.7V to
5.5V
I
OUT = 0.5A
Active
+/- 0.5
IOUT = 0.1A
Standby
+/-
0.25
VOUT LINE
%
VOUT = 1.8V
IOUT = 0.005A
Sleep
+/- 0.4
+/- 0.2
+/- 0.2
+/- 0.3
265
+/- 0.5
+/- 0.5
Load Regulation
Quiescent Current
Shutdown current
IOUT = 0.001A to 1A
IOUT = 0A to 0.1A
IOUT = 0A to 0.01A
Active
Standby
Sleep
VOUT LOAD
%
IQ ACTIVE
IQ STANDBY
IQSLEEP
ISD
Active (excluding switching losses)
Standby (excluding switching losses)
Sleep
115
μA
25
0.01
μA
P-channel On
Resistance
RDSP
VIN = 3.7V, IL(n) = 100mA
VIN = 3.7V, IL(n) = 100mA
VIN = 3.7V, L(n) = GND
VIN = 3.7V, L(n) = 3.7V
0.09
Ω
N-channel On
Resistance
RDSN
ILXP
ILXN
fSW
0.167
0.01
2.8
Ω
μA
P-channel
leakage current
N-channel
leakage current
μA
Switching
2.0
MHz
Frequency
PD, February 2011, Rev 4.4
19
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
