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參數(shù)資料
| 型號(hào)： | FAN5308 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 800mA High-Efficiency Step-Down DC-DC Converter |
| 中文描述： | 800mA的高效率降壓型DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 4/11頁(yè) |
| 文件大?。?/td> | 409K |
| 代理商： | FAN5308 |
4
www.fairchildsemi.com
FAN5308 Rev. 1.0.1
F
Electrical Characteristics
V
IN
= V
OUT
+ 0.6V(min. 2.5V) to 5.5V, I
otherwise noted. Typical values are at T
Notes:
5.Refer to the application section for further details.
6.For output voltages
≤
1.2V a 40
(PFM mode).
μ
F output capacitor value is required to achieve a maximum output accuracy of 3% while operating in power save mode
OUT
A
= 25°C.
= 350mA, V
OUT
=1.2V, EN = V
IN
, T
A
= -40°C to +85°C, Unless
Symbol
Parameter
Conditions
≤
800 mA
Min.
Typ.
Max.
Units
V
IN
Input Voltage
0 mA
≤
I
OUT
2.5
5.5
V
μ
μ
μ
I
Q
Quiescent Current
I
OUT
= 0mA, Device is not switching
20
35
A
I
switching (Note 5)
OUT
= 0mA, Device is
R2 =10K
50
A
R2 =100K
25
A
Shutdown Supply Current
EN = GND
0.1
1
μ
V
A
Undervoltage
Threshold
Lockout
V
IN
Rising
1.9
2.1
2.3
Hysteresis
150
mV
V
ENH
V
ENL
I
EN
Enable High Input Voltage
1.3
V
Enable Low Input Voltage
0.4
V
μ
m
EN input bias current
EN = V
IN
or GND
0.01
0.1
A
R
DS-ON
PMOS On Resistance
V
IN
= V
GS
= 5.5V
250
350
V
IN
= V
GS
= 2.5V
300
400
NMOS On Resistance
V
IN
= V
GS
= 5.5V
200
300
m
V
IN
= V
GS
= 2.5V
250
350
I
LIM
P-channel current limit
2.5V < V
IN
< 5.5V
1300
1500
2000
mA
Oscillator frequency
1000
1300
1500
KHz
μ
μ
%/V
I
lkg_(N)
I
lkg_(P)
N-channel leakage current
V
DS
= 5.5V
0.1
1
A
P-channel leakage current
V
DS
= 5.5V
0.1
1
A
Line regulation
I
OUT
350 mA
= 10 mA
≤
0.16
Load regulation
I
OUT
≤
800 mA
0.15
%
Vref
Reference Voltage
0.8
V
Output DC Voltage Accuracy
(Note 6)
0 mA
≤
I
OUT
≤
800 mA
-3
+3
%
Over-Temperature Protection
PWM Mode Only
350 mA
≤
I
OUT
≤
800 mA
Rising
Temperature
150
°C
Hysteresis
20
°C
Start-Up Time
I
OUT
= 800mA, C
OUT
= 20μF
800
μS
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