BM9166
250mA CMOS LDO
GENERAL DESCRIPTION
The BM9166 family is a positive voltage linear regulator
developed utilizing CMOS technology featured low quiescent
current (<55uA typ.), low dropout voltage, and high output
voltage accuracy. Built-in low on-resistance transistor provides
low dropout voltage and large output current. A 2.2µF or
greater can be used as an output capacitor.
The SOT-23-3 miniaturized package are recommended for
configuring portable devices and large current application,
respectively.
These robust devices are designed to prevent device failure
under the worst operation condition with both Thermal
Shutdown and Current Fold-back.
FEATURES
Very Low Dropout Voltage
Low Current Consumption: Typ. <55uA
Output Voltage: 1.5V, 2.5V , 3.0V, 3.3V
High Accuracy Output Voltage: +/- 1.5%
Guaranteed >200mA Output
Input Range of 1.8V to 7.0V
Thermal Shutdown
High PSRR to 60dB
Compact Package: SOT-23-3, SOT-89
Factory Pre-set Output Voltages
Short Circuit Current Fold-Back
Low Temperature Coefficient
APPLICATIONS
Battery-powered devices , like DSC , MP3 ,
portable DVD
Personal communication devices
Home electric/electronic appliances
PC peripherals ( PC card) , Hard-disc
Pin define
3
1
2
1
2
3
SOT23-3
pin1 = GND ,
pin2 = Vout ,
Pin3 = Vin
,
SOT89
pin1
＝GND
pin2 = Vin
pin3 = Vout
2004/8/30
www.digitalspirit.info
Page 1
BM9166
250mA CMOS LDO
BLOCK DIAGRAM
IN
OUT
Overcurrent
Shutdown
Therm al
Shutdown
R1
-
+
Vref = 1.176V
AMP
R2
GND
2004/8/30
www.digitalspirit.info
Page 2
BM9166
250mA CMOS LDO
ORDERING INFORMATION
Part Number
BM9166EIM23
BM9166EIM89
BM9166DIM23
BM9166DIM89
BM9166CIM23
BM9166CIM89
BM9166BIM23
BM9166BIM89
BM9166FIM23
BM9166FIM89
BM9166AIM23
BM9166AIM89
Output Voltage
1.5V
1.5V
1.8V
1.8V
2.5V
2.5V
2.8V
2.8V
3.0V
3.0V
3.3V
3.3V
Temperature Range
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
-40℃ ~ +85℃
Package
SOT-23-3
SOT-89
SOT-23-3
SOT-89
SOT-23-3
SOT-89
SOT-23-3
SOT-89
SOT-23-3
SOT-89
SOT-23-3
SOT-89
MARKING INFORMATION
Part Number
BM9166EIM23
BM9166DIM23
BM9166CIM23
BM9166BIM23
BM9166FIM23
BM9166AIM23
Output Voltage
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
Laser marking on chip
66E (168E)
66D
66C
66B
66F
66A
Package
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
Note: please contact Bookly Micro Sales office for detail if any concern or question on above information.
2004/8/30
www.digitalspirit.info
Page 3
BM9166
250mA CMOS LDO
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Output Current
Output Voltage
…………….……………………………. +7V
…………………….……
P
D
/ (V
IN
- Vo)
…………………… GND-0.3V to V
IN
+0.3V
OPERATING RATINGS
Ambient Temperature Range (T
A
) ……... -40℃ to +85℃
Junction Temperature Range …..…... -40℃ to +125℃
ESD Classification ………………………………………… B
THERMAL INFORMATION
Parameter
SOT-23-3
Thermal Resistance (Θ
jc
)
SOT-89
SOT-23-3
Thermal Resistance (Θ
ja
)
SOT-89
SOT-23-3
Internal Power Dissipation (P
D
)
(ΔT = 100℃)
Maximum Junction Temperature
Maximum Lead Temperature (10 Sec)
SOT-89
SOT-89
Maximum
110
18
325
180
300
550
2750*
150
300
℃
℃
mW
℃/W
Unit
℃/W
*With Junction sink capable of twice times ofΘ
jc
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
2004/8/30
www.digitalspirit.info
Page 4
BM9166
250mA CMOS LDO
ELECTRICAL CHARACTERISTICS
T
A
= +25℃; unless otherwise noted
BM9166
Min.
Note 1
I
o
= 1mA to 250mA
I
o
=100mA, V
OUT
=V
OUT
-2.0%, VOUT>2.5V
I
o
=100mA, V
OUT
=V
OUT
-2.0%, VOUT<=2.0V
V
OUT
> 1.2V
V
OUT
< 1.05V
V
OUT
>1.2V
V
IN
=5V, No Load
I = 1mA to 250mA
I
OUT
=5mA, V
IN
=V
OUT
+1 to V
OUT
+2, V
OUT
<= 3.0V
I
OUT
=5mA, V
IN
=V
OUT
+1 to V
OUT
+2, V
OUT
> 3.0V
I
o
=1mA to 250mA
I
O
= 100mA
C
O
=10µF ceramic
f=1KHz
f=10KHz
f=100KHz
-0.15
-0.3
0.03
0.06
0.2
60
60
46
150
30
F=10Hz to 100kHz, C
O
=10µF, I
O
= 10mA
30
25
℃
℃
μVrms
ppm/℃
300
450
55
60
0.15
0.3
1
150
300
-1.5
150mV
210mV
Typ.
Max.
7
1.5
Parameter
Input Voltage
Output Voltage Accurancy
Dropout Voltage
Output Current
Short Circuit Current
Current Limit
Quiescent Current
Ground Pin Current
Line Regulation
Load Regulation
Power Supply Rejection
Over Temperature Shutdown
Over Temperature Hystersis
Output Noise
Output Voltage Temp. Coeff.
Note 1.
V
IN(MIN)
= V
OUT
+ 0.3V
Test Conditions
Unit
V
%
mV
mV
mA
mA
mA
uA
uA
%
%
dB
DETAILED DESCRIPTION
The BM9166 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, thermal shutdown, and short circuit protection.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, short output protection, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current
and Thermal shutdown circuits become active when the junction temperature exceeds 150℃, or the current exceeds 350mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120℃.
The BM9166 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress. The BM9166 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. This
feature becomes active when the output drops below 1.05V, and reduces the current flow by 65%. Full current is restored when
the voltage exceeds 1.05V.
EXTERNAL CAPACITOR
The BM9166 is stable with an output capacitor to ground of 2.2µF or 10uF is best. It can keep stable even with higher or poor
ESR capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should
be larger than 0.1µF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground
termination is desirable.
2004/8/30
www.digitalspirit.info
Page 5
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