SP6644EU SIPEX [Sipex Corporation], SP6644EU Datasheet - Page 9

• Manufacturer Part Number: SP6644EU
• Description: Single/Dual Alkaline Cell, High Efficiency Step-Up DC-DC Converter
• Manufacturer: SIPEX [Sipex Corporation]

Rev:B Date 4/13/04
Figure 27. Internal Block Diagram of the SP6644/6645
SHDN
V
BATT
FB
+1.0V (SP6644)
+2.0V (SP6645)
V
REF
+1.25V
REFREADY
SP6644
SP6645
+1.0V (SP6644)
+2.0V (SP6645)
SP6644/6645 High Efficiency Boost Regulator
LOGIC DRV-P
DRV-N
START
OSC
UP
Damping
Inductor
9
Switch
N
N
GND
N
P
DISCHARGE
CHARGE
V
LPK
I-Discharge
I-Charge
© Copyright 2004 Sipex Corporation
BLOCK DIAGRAM
BATTLO
V
LX
OUT
R
LIM
R
LIM