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High Efficiency Synchronous
Step-Down Converter with up to
98% efficiency
800mA Output Current, only
20uA Quiescent Current
2.7V-6.5V Input Voltage range,
Output Adjustable down to 0.8V
MSOP Package & Ceramic
Capacitors for small, low profile
Power Supply
Ideal for PDAs, Digital Cameras,
Wireless Modems, Cellular
Telephones
DESCRIPTION
The SP6651A Evaluation Board is designed to help the user evaluate the performance
of the SP6651A for use as a single Li-Ion battery Step-Down DC-DC Converter. The
SP6651A operates from 2.7V to 6.5V input, with the highest efficiency in the range 3.0V
to 4.2V where the Li-Ion battery has the most energy. The SP6651A evaluation board
is a complete power supply circuit to provide ease of evaluation for the DC/DC
Converter performance.
FIGURE 1. SP6651A 3.3V OUTPUT EVALUATION BOARD SCHEMATIC
Vin 2.7 - 6.5VDC
BLON
1
J1
2
D1
3
1
2
D0
J2
3
CIN
22uF
RV IN
10.0
U1
1
10
PV in
LX
2
9
V in
PGND
3
8
BLON
GND
4
7
D1
V out
5
6
D0
FB
SP6651A
CV IN
1.0uF
SP6651EB
Evaluation Board Manual
L1
10uH
CF
22pF
1
Vout 3.3V 800mA
RF
825K
COUT
22uF
RI
261K
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Table of Contents
Related Manuals for Sipex SP6651EB
Summary of Contents for Sipex SP6651EB
- Page 1 SP6651EB Evaluation Board Manual High Efficiency Synchronous Step-Down Converter with up to 98% efficiency 800mA Output Current, only 20uA Quiescent Current 2.7V-6.5V Input Voltage range, Output Adjustable down to 0.8V MSOP Package & Ceramic Capacitors for small, low profile Power Supply...
- Page 2 FIGURE 2. SP6651A 1.5V OUTPUT EVALUATION BOARD SCHEMATIC Vin 2.7 - 6.5VDC 22uF RV IN 10.0 BLON 10uH Vout 1.5V 800mA PV in V in PGND 226K BLON 22pF V out COUT 22uF 261K SP6651A CV IN 1.0uF USING THE EVALUATION BOARD 1) Powering up the SP6651A Circuit &...
- Page 3 Table 2. SP6651EB BILL OF MATERIALS Component Vo = 3.3V Vo = 1.5V 10uH, CDRH5D28-100, Sumida 10uH, CDRH5D28-100, Sumida 22uF, TDK C3225X5R0J226M 22uF, TDK C3225X5R0J226M COUT 22uF, TDK C3225X5R0J226M 22uF, TDK C3225X5R0J226M RVIN 10 Ohm 5% 10 Ohm 5% CVIN...
- Page 4 EVALUATION BOARD LAYOUT FIGURE 3: SP6651AEU COMPONENT PLACEMENT FIGURE 4: SP6651AEU PC LAYOUT TOP SIDE FIGURE 5: SP6651AEU PC LAYOUT BOTTOM SIDE...
- Page 5 ORDERING INFORMATION Model Temperature Range Package Type SP6651EB ......…..-40°C to +85°C....SP6651 Evaluation Board...
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