参数资料
型号: FAN5361UMP10X
厂商: FAIRCHILD SEMICONDUCTOR CORP
元件分类: 稳压器
英文描述: SWITCHING REGULATOR, DSO6
封装: 2 X 2 MM, ROHS COMPLIANT, MO-229VCCC, UMLP-6
文件页数: 14/17页
文件大小: 1565K
代理商: FAN5361UMP10X
2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5361 Rev. 1.0.0
6
FAN5361
6MHz,
60
0mA
TinyBu
ck
Syn
c
hronous
Buck
Regu
lator
Typical Performance Characteristics (Continued)
Unless otherwise noted, VIN = VEN = 3.6V, VMODE = 0V, VOUT = 1.82V, TA = 25°C.
5
10
15
20
25
30
35
40
45
50
0
0.1
0.2
0.3
0.4
0.5
0.6
V
OUT
R
ip
p
le
(m
V
p
)
VIN=2.5V
VIN=3.6V
VIN=5.5V
ILOAD Output Current (A)
COUT=4.7μF nom.
0
5
10
15
20
25
30
35
40
45
0
0.1
0.2
0.3
0.4
0.5
0.6
ILOAD Output Current (A)
V
OUT
R
ipp
le
(
m
Vp
p)
2.5VIN
3.6VIN
5.5VIN
VOUT=1.2V
COUT=4.7F nom.
Figure 11. Peak-to-Peak Output Voltage Ripple
Figure 12. 1.2VOUT Peak-to-Peak Output Voltage Ripple
0
1
2
3
4
5
6
7
0
0.1
0.20.3
0.40.5
0.6
Load Current (A)
S
w
it
chi
n
g
F
req
uen
cy
(
M
H
z)
VIN>2.4V
VIN=2.3V
VOUT=1.2V
Figure 13. Effect of tOFF(MIN) on Switching Frequency
Figure 14. 1.2VOUT Effect of tOFF(MIN) on
Switching Frequency
0
50
100
150
200
250
300
350
2.53.0
3.54.0
4.55.0
5.5
Input Voltage (V)
L
o
ad
C
u
rr
en
t(
m
A
)
PFM Border
PWM Borde
The switching mode changes
at these borders
Always PFM
Always PWM
0
50
100
150
200
250
300
350
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Lo
ad
C
u
rr
ent
(
m
A
)
PFM border
PWM border
The switching mode changes
at these borders
Always PWM
Always PFM
Figure 15. PFM / PWM Boundaries
Figure 16. 1.2VOUT PFM / PWM Boundaries
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