SP6656_06 Datasheet, PDF (2/16 Pages) Sipex Corporation – High Efficiency 400mA Synchronous Buck Regulator with Dynamically Adjustable Voltage Output

PV_IN,V_IN .............................................................................................. 6V
All other pins .............................................................. -0.3V to V +0.3V
IN
PV_IN, P_GND, LX current ........................................................................ 2A
Storage Temperature .................................................. -65 °C to 150 °C
Operating Temperature ................................................. -40°C to +85°C
ABSOLUTE MAXIMUM RATINGS
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
V_IN = UV_IN = V_EN = 3.6V, V_OUT = V_FB, I_O = 0mA, T_AMB = -40°C to +85°C, typical values at 25°C unless otherwise noted.
PARAMETER
Input Voltage Operating
Range
Minimum Output Voltage
FB Set Voltage, Vr
MIN
UVLO
1.0
0.784
Overall Accuracy
(-40°C to 85°C)
(0°C to 70°C)
On-Time Constant - K_ON
1.5
Min, T_ON=K_ON/(V_IN-V_OUT)
Off-Time Constant - K_OFF
1.6
Min, T_OFF=K_OFF/V_OUT
Off-Time Blanking
Turn On Time
PMOS Switch Resistance
NMOS Switch Resistance
Inductor Current Limit
500
Power Efficiency
Minimum Guaranteed Load
400
Current
V_IN Quiescent Current
V_IN Shutdown Current
V_OUT Quiescent Current
V_OUT Shutdown Current
UVLO
Undervoltage Lockout
Threshold, V_IN falling
UVLO hysteresis
2.55
OVSO Output Voltage
OVSO Leakage Current
Over-Temperature
Rising Trip Point
Over-Temperature Hysteresis
EN Leakage Current
EN Input Threshold Voltage
0.60
FB Leakage Current
LX Leakage
OVSI Leakage Current
OVSI Input Threshold Voltage 0.60
TYP
0.800
2.25
2.4
100
250
0.3
0.3
625
96
92
500
20
1
2
1
2.70
40
50
5
140
14
1
0.90
1.25
1
3
1
0.90
1.25
MAX UNITS CONDITIONS
5.5
V
0.816
±5
±4
3.0
3.2
400
0.6
0.6
750
V
V
%
V*µs
V*µs
ns
µs
Ω
Ω
mA
%
mA
25°C, I_O = 200mA Close Loop. L_I = 10µH,
C_OUT = 22µF
Measured at V_IN = 5.5V, no load and
V_IN=3.6V, 200mA load, Close Loop
Close Loop, L_I = 10µH,C_OUT = 22µF
Inductor current limit tripped, VFB = 0.5V
Measured at V_OUT = 1V
400mA Load
I_PMOS = 200mA
I_NMOS = 200mA
VFB = 0.5V
V_OUT = 2.5V, I_O = 200mA
V_OUT = 3.3V, I_O = 400mA
30
µA V_OUT = 3.3V, V_IN = 3.6V and V_IN = 5.5V
500
nA EN = 0.0V
5
µA V_OUT = 3.3V
500
nA EN = 0.0V
2.85
V
EN = V_IN,
mV
100
mV V_IN = EN; Iovso =1mA; OVSI = 1 = Vcc
100
nA V_IN = EN; Vovso= 3.6V;OVSI= 0.0V= GND
°C
°C
500
nA
V High to Low Transition
1.8
V Low to High Transition
100
nA FB =1V
5
µA EN = 0.0V, V_IN = 3.6V
LX = 0.0V, LX = V_IN + 0.2V
500
nA
V High to Low Transition
1.8
Low to High Transition
Date: 3/6/06
SP6656, 400mA Synchronous Buck Regulator with Dynamically Adjustable Voltage Output
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© Copyright 2006 Sipex Corporation