WM8351 Datasheet, PDF (18/330 Pages) Wolfson Microelectronics plc – Wolfson AudioPlus™ Stereo CODEC with Power Management

WM8351
Production Data
7.2 DC-DC STEP UP CONVERTER ELECTRICAL CHARACTERISTICS
Test Conditions
TA = +25ºC unless otherwise noted.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX
DC-DC2
Input voltage
range
Output voltage
range
USB OTG output
voltage
VIN
V_OUT
VOUT,USB
Output current
IOUT
Switch resistance
R_ON
Maximum switch
current
Switching
frequency
Maximum duty
cycle
Efficiency
ISW,MAX
fCLK
DMAX
Η
Quiescent current
Regulated
feedback voltage
Undervoltage
detect
Overvoltage
detect
Peak inductor
current limit
On resistance of
NGATE driver
Input capacitor
Inductor
Inductor current
rating
IDD
V_FB
V_CURR
VFB,UV
VUSB,UV
V_FB,OV
V_USB,OV
IPK
R_NGATE
CIN
LF
I_SAT,Lf
Output capacitor
C_OUT
when used as converter
when used as switch
by default
(needs external component configuration)
VIN<4.5V; IOUT<100mA;
DC2_FBSRC [1:0]=11
VOUT=30V
VOUT=20V
(DC2_ILIM_=1)
V_OUT=5.0V
(DC2_ILIM_=1)
V_IN=3.3V; V_OUT=3.2V; +25°C
V_IN=1.8V; V_OUT=1.7V; +25°C
VIN=1.2V; VOUT=1.1V; +25°C
V_IN=3V; f_CLK=1.0MHz
V_IN=3.8V; V_OUT=20V; I_OUT=20mA
V_IN=3.8V; V_OUT=5.0V; I_OUT=100mA
Shutdown or switch configuration
active; no switching
active; pulse skipping
DC2_FBSRC [1:0] = 00
DC2_FBSRC [1:0] = 01 or 10
below feedback voltage
DC2_FBSRC [1:0] = 11
above feedback voltage
DC2_FBSRC [1:0] = 11
VIN=3V; VOUT=90%;
DC2_ILIM_=1
P-Channel FET (I_PFET=100mA)
N-Channel FET (INFET=100mA)
X5R/X7R dielectric
DC2_ILIM_=1
DC2_FBSRC [1:0]= 00 or 11; VOUT=5V
DC2_FBSRC [1:0]= 00; V_OUT=10V
DC2_FBSRC [1:0]= 00; V_OUT=20V
DC2_FBSRC [1:0]= 01 or 10; VOUT=10V
DC2_FBSRC [1:0]= 01 or 10; VOUT=15V
DC2_FBSRC [1:0]= 01 or 10; V_OUT=20V
2.7
1.2
3.7
5.5
V_IN
20
(30)
5.0
25
40
0
(18)
170
(100)
0.26
0.41
0.84
700
1.0
1.0
-30%
500
320
3.7
0.84
0.18
2.0
1.5
0.9
90
75
88
0.1
260
260
0.5
0.5
12
4.6
8
5.4
700
450
4.6
4.9
2.2
10
10
2.2
0.47
4.7
2.2
1.5
+30%
22
4.7
1.0
10
10
4.7
UNITS
V
V
V
mA
Ω
mA
MHz
%
%
uA
V
%
V
%
V
mA
Ω
F
H
mA
F
w
PD, April 2012, Rev 4.5
18