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參數(shù)資料
| 型號： | MIC2224YML |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency 2MHz PWM Buck Converter with DAC Input and 40mOHM Bypass Switch |
| 中文描述： | 2.5 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, MLF-10 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大小： | 332K |
| 代理商： | MIC2224YML |
Micrel
MIC2224
Absolute Maximum Rating (Note 1)
Supply Voltage (V
IN
) .....................................0V to 6V
Output Switch Voltage (V
SW
) ................................. 6V
DAC Input Voltage (V
DAC
)...................0V to V
in
+0.3V
Output Switch Current (I
SW
)................................ 2.5A
Logic Input Voltage (V
EN
)....................0V to V
IN
+0.3V
Storage Temperature (T
S
) ............... -65
°
C to +150
°
C
Electrical Characteristics
(4)
January 2005
3
M9999-012705
www.micrel.com
Operating Ratings
Supply Voltage (V
IN
)................................2.7V to 5.5V
Output Voltage (V
OUT
)................................0V to 5.5V
DAC Input Voltage (V
DAC
) ......................... 0.1V to V
in
Junction Temperature Range (T
J
) ..-40
°
C to +125
°
C
Thermal Resistance
θ
JA
MLF....................................................60
°
C/W
V
IN
= V
EN
= 3.6V;V
DAC
=0.6V; L = 4.7
μ
H; C
OUT
= 1
μ
F; T
A
= 25°C, unless noted.
Bold
values indicate –40°C< T
J
< +125°C
Parameter
Condition
Min
Typ
Max
Units
Supply Voltage Range
2.7
5.5
V
Total Quiescent Current
V
DAC
= 0.6V V
OUT
= 2.4V
(regulator on, not switching)
360
450
μ
A
Shutdown Current
V
EN
= 0V (regulator off)
1
5
μ
A
Maximum Duty Cycle
Regulation
Output Voltage
100
%
V
DAC
= 0.6V, I
LOAD
=0mA
3.0V
≤
V
IN
≤
4.5, I
LOAD
= 10mA
0mA < I
OUT
< 500mA
1.746
1.8
1.854
V
Output Voltage Line Regulation
0.05
0.5
%/V
Output Voltage Load Regulation
Output
0.2
%
Switch On-Resistance
I
SW
= -100mA, High-Side Switch
I
SW
= 100mA , Low-Side Switch
0.55
0.6
0.75
0.85
Current limit (Peak SW Current)
Oscillator
0.65
0.85
1.6
A
Frequency
Enable / UVLO
Enable Pin Threshold
1.8
2
2.2
MHz
0.5
0.9
1.3
V
Enable Pin Hysteresis
30
mV
Enable Pin Input Current
0.01
1
μ
A
EN high to 90% V
OUT
25
50
μ
s
Under-Voltage Lockout Threshold
(turn-on)
2.6
2.7
V
UVLO Hysteresis
DAC Input
85
mV
DAC Input Current
0.15
2
μ
A
Output Voltage/DAC Voltage
(internally set)
3
V/V
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