SP4446 Datasheet, PDF (2/10 Pages) Sipex Corporation – High Output Voltage Boost Regulator LCD Bias Regulator

V_IN ....................................................................... 15V
SW Voltage .............................................. -0.4 to 34V
FB Voltage .......................................................... 2.5V
All other pins .................................. -0.3 to V_CC + 0.3V
Current into FB ................................................. ±1mA
T_J Max ............................................................. 125°C
Operating Temperature Range ............ -40°C to 85°C
Peak Output Current < 10us SW .................... 500mA
Storage Temperature ...................... -65°C to +150°C
Power Dissipation. ......................................... 200mW
ABSOLUTE MAXIMUM RATINGS
Lead Temperature (Soldering, 10 sec) ............ 300°C
ESD Rating ................................................. 2kV HBM
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
ELECTRICAL CHARACTERISTICS
Specifications are at V_IN = 3.3V, V_SHDN = V_IN, T_A = 25°C, ♦ denotes the specifications which apply over the full operating
temperature range, unless otherwise specified.
PARAMETER
SYMBOL MIN TYP MAX UNITS
CONDITIONS
Input voltage
V_IN
1.0
8.0 V
Switch Current Limit =
150mA
Supply Current
I_Q
20 30 µA
♦
No Switching
0.01 1
µA
SHDN = 0.0V
Reference Voltage
V_FB 1.17 1.22 1.27 V
♦
FB Hysteresis
HYST
8
mV
V_FB Input Bias Current
I_FB
15 80 nA
♦
V_FB = 1.22V
Line Regulation
∆V_o/∆V_I
0.04
%/V
1.2 ≤ V_IN ≤ 8V
Switch Off Time
T_OFF
300
nS
V_FB > 1V
1200
nS
V_FB < 0.3V
Switch Saturation Voltage
V_CESAT
50
mV
♦
I_SW = 50mA
150
mV
I_SW = 150mA
Switch Current Limit
I_LIM
100 150 200 mA
♦
SHDN Bias Current
I_SHDN
5 12 µA
♦
V_SHDN = 5V
SHDN High Threshold (on)
V_IH
0.9
V
SHDN Low Threshold (off)
V_IL
0.25 V
Switch Leakage Current
I_SWLK
2
5
µA
♦
Switch Off, V_SW = 5V
PIN NUMBER
1
2
3
4
5
Mar28-08
PIN NAME
SW
GND
FB
SHDN
VIN
PIN DESCRIPTION
DESCRIPTION
Switch input to the internal power switch.
Ground
Feedback
Shutdown. Pull high (on) to enable. Pull low (off) for shutdown.
Input Voltage. Bypass this pin with a capacitor as close to the device
as possible.
SP4446 High Output Voltage Boost Regulator, LCD Bias Regulator
2
© 2008 Exar Corporation