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參數(shù)資料
| 型號： | MIC5252-4.75BM5 |
| 廠商： | MICREL INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Dual 3A Non-Synchronous Buck Converter with Integrated High Side MOSFET, 300 kHz 14-HTSSOP -40 to 125 |
| 中文描述： | 4.75 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 3/9頁 |
| 文件大?。?/td> | 86K |
| 代理商： | MIC5252-4.75BM5 |
MIC5252
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) .................................. 0V to +7V
Enable Input Voltage (V
EN
) ................................. 0V to +7V
Power Dissipation (P
D
) ........................ Internally Limited
(3)
Junction Temperature (T
J
) .......................
–
40
°
C to +125
°
C
Storage Temperature ...............................
–
65
°
C to +150
°
C
Lead Temperature (soldering, 5 sec.) ....................... 260
°
C
ESD
(4)..............................................................................................
2kV
Micrel
December 2003
3
M0394-121003
Electrical Characteristics
(5)
V
IN
= V
OUT
+ 1V, V
EN
= V
IN;
I
OUT
= 100
μ
A; T
J
= 25
°
C,
bold
values indicate
–
40
°
C
≤
T
J
≤
+125
°
C; unless noted.
Symbol
Parameter
Conditions
Min
Typical
Max
Units
V
O
Output Voltage Accuracy
I
OUT
= 100
μ
A
–
1
–
3
1
3
%
%
V
LNR
V
LDR
V
IN
–
V
OUT
Line Regulation
V
IN
= V
OUT
+ 1V to 6V
I
OUT
= 0.1mA to 150mA
(6)
I
OUT
= 100
μ
A
I
OUT
= 100mA
I
OUT
= 150mA
0.02
0.05
%/V
Load Regulation
Dropout Voltage
(7)
0.6
1.5
%
0.1
5
mV
90
150
mV
135
200
250
mV
mV
I
Q
I
GND
Quiescent Current
Ground Pin Current
(8)
V
EN
≤
0.4V (shutdown)
I
OUT
= 0mA
I
OUT
= 150mA
f = 10Hz, C
OUT
= 1.0
μ
F, C
BYP
= 0.01
μ
F
f = 10Hz, V
IN
= V
OUT
+ 0.3V
f = 10kHz, V
IN
= V
OUT
+ 0.3V
V
OUT
= 0V
C
OUT
= 1.0
μ
F, C
BYP
= 0.01
μ
F,
f = 10Hz to 100kHz
0.2
1
μ
A
90
150
μ
A
117
200
μ
A
PSRR
Ripple Rejection; I
OUT
= 150mA
63
dB
48
dB
48
dB
I
LIM
e
n
Current Limit
250
425
mA
Output Voltage Noise
30
μ
V(rms)
Enable Input
V
IL
V
IH
I
EN
Enable Input Logic-Low Voltage
V
IN
= 2.7V to 5.5V, regulator shutdown
V
IN
= 2.7V to 5.5V, regulator enabled
V
IL
≤
0.4V, regulator shutdown
V
IH
≥
1.6V, regulator enabled
0.4
V
Enable Input Logic-High Voltage
1.6
V
Enable Input Current
0.01
1
μ
A
0.01
1
μ
A
Shutdown Resistance Discharge
500
Thermal Protection
Thermal Shutdown Temperature
150
°
C
Thermal Shutdown Hysteresis
10
°
C
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T
(ambient temperature) is P
(max) = (T
(max)
–
T
)/
θ
. Exceeding the maximum allowable
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The
θ
JA
of the MIC5252-x.xBM5 (all
versions) is 235
°
C/W on a PC board. See
”
Thermal Considerations
”
section for further details.
4. Devices are ESD sensitive. Handling precautions recommended.
5. Specification for packaged product only.
6. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range
from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
7. Dropout Voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differen-
tial. For outputs below 2.7V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.7V. Minimum input operating
voltage is 2.7V.
8. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current.
Operating Ratings
(2)
Input Voltage (V
IN
) ......................................... +2.7V to +6V
Enable Input Voltage (V
EN
) .................................. 0V to V
IN
Junction Temperature (T
J
) .......................
–
40
°
C to +125
°
C
Thermal Resistance
SOT-23
(θ
JA
) .....................................................235
°
C/W
2x2 MLF
(θ
JA
) ..................................................90
°
C/W
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