Sipex SP6651EB, Manual, Page: 3 / 5

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Table 2. SP6651EB BILL OF MATERIALS
Table 3. SP6651A PIN ASSIGNMENT
Pin
Name
Pin Description
Pin
NO.
PVin
Input voltage power pin. Inductor charging current passes
through this pin.
1
Vin
Internal supply voltage. Control circuitry powered from this
pin.
2
BLON
Open drain battery low output – need to pullup to supply
externally. Vin - Vout below threshold pulls this node to
ground. Vin - Vout above threshold, this node is open.
3
D1 Digital mode control input. See Table 1 for definition. 4
D0 Digital mode control input. See Table 1 for definition. 5
FB
External feedback network input connection. Connect a
resistor from FB to ground and FB to Vout to control the
output voltage. This pin regulates to the internal reference
voltage of 0.8V.
6
Vout
Output voltage sense pin. Used for internal timing and BLON
circuitry.
7
GND Internal ground pin. Control circuitry returns current to this pin. 8
PGND
Power ground pin. Synchronous rectifier current returns
through this pin.
9
LX
Inductor switching node. Inductor tied between this pin and
the output capacitor to create Vout.
10
Component Vo = 3.3V Vo = 1.5V
L1 10uH, CDRH5D28-100, Sumida 10uH, CDRH5D28-100, Sumida
CIN 22uF, TDK C3225X5R0J226M 22uF, TDK C3225X5R0J226M
COUT 22uF, TDK C3225X5R0J226M 22uF, TDK C3225X5R0J226M
RVIN 10 Ohm 5% 10 Ohm 5%
CVIN 1uF ceramic X7R SM 0805 1uF ceramic X7R SM 0805
RI 261k 1% 261k 1%
RF 825k 1% 226k 1%
CF 22pF ceramic 22pF ceramic
U1 SP6651AEU SP6651AEU