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參數資料
| 型號： | FAN2002 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1A High-Efficiency Step-Down DC-DC Converter |
| 中文描述： | 1A條高效率降壓型DC - DC轉換器 |
| 文件頁數： | 4/11頁 |
| 文件大小： | 329K |
| 代理商： | FAN2002 |
4
www.fairchildsemi.com
FAN2001/FAN2002 Rev. 1.0.2
F
Electrical Characteristics
V
IN
= V
OUT
+ 0.6V(min. 2.5V) to 5.5V, I
Unless 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
mode (PFM mode).
μ
F output capacitor value is required to achieve a maximum output accuracy of 3% while operating in power save
OUT
= 350mA, V
= 25°C.
OUT
=1.2V, EN = V
IN
, T
A
= -40°C to +85°C,
A
Symbol
Parameter
Conditions
≤
600 mA
≤
1000 mA
Min.
Typ.
Max.
Units
V
IN
Input Voltage
0 mA
≤
≤
I
OUT
2.5
5.5
V
0 mA
I
OUT
2.7
5.5
V
μ
μ
μ
μ
V
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
A
Undervoltage
Threshold
Lockout
V
IN
Rising
1.9
2.1
2.3
Hysteresis
150
mV
V
ENH
V
ENL
I
EN
R
DS-ON
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
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
≤
10 mA
350 mA
0.1
1
A
Line regulation
I
OUT
0.16
Load regulation
≤
I
OUT
≤
1000 mA
0.15
%
Vref
Reference Voltage
0.8
V
Output DC Voltage Accuracy
(Note 6)
0 mA
≤
I
OUT
≤
1000 mA
-3
+3
%
Over-Temperature Protection PWM Mode Only
350 mA
≤
I
OUT
≤
1000 mA
Rising
Temperature
150
°C
Hysteresis
20
°C
Start-Up Time
I
OUT
= 1000 mA, C
OUT
= 20 μF
800
μS
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