SC4501STDEVB Semtech, SC4501STDEVB Datasheet - Page 16

• Manufacturer Part Number: SC4501STDEVB
• Description: EVALUATION BOARD
• Manufacturer: Semtech

Specifications of SC4501STDEVB

• Silicon Manufacturer: Semtech
• Application Sub Type: Step Up Switching Regulator
• Kit Application Type: Power Management - Voltage Regulator
• Silicon Core Number: SC4501
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 11(a). 1.2 MHz All Ceramic Capacitor Single Li-ion Cell
POWER MANAGEMENT
Typical Application Circuits
2005 Semtech Corp.
2.6 - 4.2V
1-CELL
LI-ION
to 5V Boost Converter.
OFF
C1
2.2 F
47nF
C3
ON
8
3
L1: Sumida CR43
SHDN
SS
IN
GND
6
Figure 11(c). Load Transient Response of the Circuit in Figure
4
SC4501
1.8 H
L1
ROSC
7
COMP
Upper Trace : Output Voltage, AC Coupled, 0.5V/div
Lower Trace : Inductor Current, 0.5A/div
5
SW
FB
R4
10.7K
10BQ015
2
1
11(a). I
1A/ s.
D1
R3
17.4K
1nF
C4
V
IN
=2.6V
LOAD
is switched between 0.2A and 0.7A at
301K
100K
R1
R2
40 s/div
5V, 0.8A
VOUT
10 F
C2
16
Figure 11(b). Efficiency of the Single Li-ion Cell to 5V Boost
95
90
85
80
75
70
65
60
55
50
0.001
Converter in Figure 11(a).
V
1.2MHz
OUT
V
IN
= 5V
= 3.6V
0.010
Load Current (A)
V
Efficiency
IN
= 4.2V
V
IN
= 2.6V
0.100
www.semtech.com
SC4501
1.000