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Date: 6/7/06 Rev B SP6648 Ultra-low Quiescent Current, High Efficiency Boost Regulator © 2006 Sipex Corporation
LX, Vo, V
BATT
, LBON, FB to GND pin ................................ -0.3 to 6.0V
SHDN, LBI ........................................................... -0.3V to V
BATT
+1.0V
Vo, GND, LX Current ....................................................................... 2A
Reverse V
BATT
Current .............................................................. 220mA
Forward V
BATT
Current .............................................................. 500mA
Storage Temperature .................................................. -65 °C to 150°C
PARAMETER MIN TYP MAX UNITS ♦ CONDITIONS
Input Voltage Operating Range, V
BATT
0.7 4.5 V ♦ After Startup
Output Voltage Range, V
OUT
2.5 5.5 V ♦
Start-up Input Voltage, V
BATT
0.85 1.1 V ♦ R
LOAD
= 3kΩ
Under Voltage Lock-out/UVLO 0.5 0.61 0.7 V ♦
Output Voltage, V
O
3.12 3.30 3.48 V ♦ Internal Feedback Divider
Quiescent Current into V
O
, I
QO
12 25 μA ♦ V
OUT
= 3.3V, V
FB
= 1.5V, Toggle SHDN
Quiescent Current into V
BATT
, I
QB
250 750 nA ♦ V
OUT
= 3.3V, V
FB
= 1.5V
Shutdown Current into V
O,
I
SDO
1 500 nA ♦ V
SHDN
= 0.0V
Shutdown Current into V
BATT,
I
SDB
250 750 nA ♦ V
SHDN
= 0.0V, V
BATT
= 2.6V
Efficiency 84 % V
BATT
= 1.3V, I
OUT
= 100mA, R
LIM =
2kΩ
92 % V
BATT
= 2.6V, I
OUT
= 200mA, R
LIM =
2kΩ
Inductor Current Limit, I
PK
= 1600/R
LIM
650 800 1000 mA ♦ R
LIM
= 2kΩ
1300 1600 2000 mA ♦ R
LIM
= 1kΩ
100 mA V
BATT
= 1.3V, R
LIM
= 4kΩ
Output Current 200 mA V
BATT
= 2.6V, R
LIM
= 4kΩ
150 mA V
BATT
= 1.3V, R
LIM
=2kΩ
400 mA V
BATT
= 2.6V, R
LIM
=2kΩ
Minimum Off-Time Constant K
OFF
0.5 1.0 1.5 V*μs ♦ K
OFF
≤ T
OFF
(V
OUT
- V
BATT
)
Maximum On-Time Constant K
ON
2.5 4.0 5.5 V*μs ♦ K
ON
≥ T
ON
(V
BATT
)
Enable Valid to Output Stable 300 500 μsI
LOAD
= 1mA
NMOS
Switch Resistance 0.30 0.6 Ω♦I
NMOS
= 100mA
PMOS
Switch Resistance 0.30 0.6 Ω♦I
PMOS
= 100mA
FB Set Voltage, V
FB
1.19 1.25 1.31 V ♦ External feedback
FB Input Current 1 100 nA ♦ V
FB
=1.3V
LBI Falling Trip Voltage 0.56 0.61 0.66 V ♦
LBI Hysteresis 25 mV
Low Output Voltage for LBON, V
OL
0.4 V ♦ V
BATT
= 1.3V, I
SINK
= 1mA
Leakage current for LBON 1 μA ♦ V
BATT
= 1.3V, V
LBON
= 3.3V
SHDN Input Voltage, Note 1
V
IL
0.25 ♦ V
BATT
= 1.3V
V
IH
1.0 V ♦ V
BATT
= 1.3V
V
IL
0.5 ♦ V
BATT
= 2.6V
V
IH
2.0 ♦ V
BATT
= 2.6V
SHDN Input Current 1 100 nA ♦
LX Pin Leakage 3 μA
ELECTRICAL SPECIFICATIONS
V
BATT
=V
SHDN
= 2.6V, V
FB
=0.0V, I
LOAD
= 0mA, T
AMB
= -40°C to +85°C, V
OUT
= +3.3V, typical values at 27°C unless
otherwise noted. The
♦ denotes the specifications which apply over full operating temperature range -40°C to +85°C, unless
otherwise specified.
Operating Temperature ................................................ -40°C to +85°C
ESD Rating ........................................................................ 1.5kV 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.
ABSOLUTE MAXIMUM RATINGS
Note 1: SHDN must transition faster than 1V/100mS for proper operation.
