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Date: 5/25/04 SP6651A High Efficiency 800mA Synchronous Buck Regulator © Copyright 2004 Sipex Corporation
PARAMETER MIN TYP MAX UNITS CONDITIONS
Input Voltage Operating UVLO 5.5 V Result of I
Q
measurement at V
IN
=PV
IN
=5.5V
Range
Minimum Output Voltage 1.0 V
FB Set Voltage, Vr 0.784 0.800 0.816 V 25°C, I
O
=200mA Close Loop. L
I
= 10µH,
C
OUT
= 22µF
Overall Accuracy Measured at V
IN
=5.5V, no load and
(-40°C to 85°C) ±5%V
IN
=3.6V, 200mA load, Close Loop
(0°C to 70°C) ±4
On-Time Constant - K
ON
1.5 2.25 3.0 V*µs Close Loop, L
I
= 10µH,C
OUT
= 22µF
Min, T
ON
=K
ON
/(V
IN
-V
OUT
)
Off-Time Constant - K
OFF
1.6 2.4 3.2 V*µs Inductor current limit tripped, VFB=0.5V
Min, T
OFF
=K
OFF
/V
OUT
Measured at V
OUT
= 2V
Off-Time Blanking 100 ns
PMOS Switch Resistance 0.3 0.6 Ω I
PMOS
= 200mA
NMOS Switch Resistance 0.3 0.6 Ω I
NMOS
= 200mA
Inductor Current Limit 1.0 1.25 1.50 A VFB=0.5V
LX Leakage Current 0.01 3 µA D0=D1=0
Power Efficiency 96 % V
OUT
=2.5V, I
O
=200mA
92 V
OUT
=3.3V, I
O
=800mA
Minimum Guaranteed Load 800 900 mA
Current
V
IN
Quiescent Current 20 30 µAV
OUT
=3.3V, V
IN
=3.6V and V
IN
= 5.5V
V
IN
Shutdown Current 1 500 nA D1=D0=0V
V
OUT
Quiescent Current 2 5 µAV
OUT
= 3.3V
V
OUT
Shutdown Current 1 500 nA D1=D0=0V
UVLO 2.55 2.70 2.85 D1=0V, D0=V
IN
Undervoltage Lockout 2.70 2.85 3.00 V D1=V
IN
, D0=0V
Threshold, V
IN
falling 2.85 3.00 3.15 D1=V
IN
, D0=V
IN
UVLO hysteresis 40 mV
Battlo Trip Voltage, V
IN
falling 265 300 335 mV Measured as V
IN
-V
OUT
Battlo Trip Voltage Hysteresis 9 mV
BLON Low Output Voltage 0.4 V V
IN
=3.3V, I
SINK
=1mA
BLON Leakage Current 1 µAV
BLON
=3.6V
Over-Temperature 140 °C
Rising Trip Point
Over-Temperature Hysteresis 14 °C
D1,D0 Leakage Current 1 500 nA
D1,D0 Input Threshold Voltage 0.60 0.90 V High to Low Transition
1.25 1.8 V Low to High Transition
FB Leakage Current 1 100 nA FB=1V
V
IN
=UV
IN
=V
SDN
=3.6V, V
OUT
=V
FB
, I
O
= 0mA, T
AMB
= -40°C to +85°C, typical values at 27°C unless otherwise noted.
PV
IN
,V
IN
.............................................................................................. 6V
All other pins .............................................................. -0.3V to V
IN
+0.3V
PV
IN
, P
GND
, LX current ........................................................................ 2A
Storage Temperature .................................................. -65 °C to 150 °C
Operating Temperature ................................................. -40°C to +85°C
Lead Temperature (Soldering, 10 sec) ....................................... 300 °C
Thermal Resistance ø
JA
:
10-Pin MSOP....................................................................128°C/W
10-Pin DFN ........................................................................68°C/W
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
