參數(shù)資料
型號: FAN5361UMP123X
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: 1.25 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, PDSO6
封裝: 2 X 2 MM, MO-229VCCC, UMLP-6
文件頁數(shù): 15/18頁
文件大?。?/td> 1326K
代理商: FAN5361UMP123X
2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5361 Rev. 1.1.1
6
FAN5361
6MHz,
6
00mA
/750mA
Synchronous
Buck
Regul
ator
Typical Performance Characteristics (Continued)
Unless otherwise noted, VIN = VEN = 3.6V, VMODE = 0V (AUTO Mode), VOUT = 1.82V, TA = 25°C.
1.805
1.810
1.815
1.820
1.825
1.830
1
10
100
1,000
I LOAD Output Current (mA)
V
OU
T
(V
)
Auto PWM/PFM
Forced PWM
0
5
10
15
20
25
30
35
40
45
0
100
200
300
400
500
600
Load Current (mA)
V
out
(
m
V
p
)
3.6VIN
5.5VIN
2.5VIN
Figure 11. Load Regulation, Auto PFM / PWM and
Forced PWM
Figure 12. 1.82VOUT Peak-to-Peak Output Voltage Ripple
0
5
10
15
20
25
30
0
100
200
300
400
500
600
Load Current (mA)
V
out
(mV
pp)
3.6VIN
5.5VIN
2.5VIN
1
2
3
4
5
6
7
0
0.1
0.20.3
0.40.5
0.6
Load Current (A)
Sw
it
ch
ing
Fr
eq
ue
nc
y(
M
H
z)
VIN>2.9V
VIN=2.7V
VIN=2.5V
VIN=2.3V
FPWM Mode
Figure 13. 1.233VOUT Peak-to-Peak Output Voltage
Ripple
Figure 14. Effect of tOFF(MIN) on Reducing Switching
Frequency
0
1
2
3
4
5
6
7
0
0.1
0.2
0.3
0.4
0.5
0.6
Load Current (A)
Sw
it
ch
in
g
Fr
eq
ue
n
cy
(
M
H
z)
VIN>2.4V
VIN=2.3V
FPWM Mode
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)
L
o
ad
C
u
rr
en
t
(m
A
)
PFM border
PWM border
Always PFM
The switching mode changes
at these borders
Always PWM
Figure 15. 1.233VOUT Effect of tOFF(MIN) on Reducing
Switching Frequency
Figure 16. PFM / PWM Boundaries
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