EC8841 [E-CMOS]
50mA Ultra-Low Quiescent Current LDO Linear Regulator;
| 型号： | EC8841 |
| 厂家： | 
E-CMOS Corporation |
| 描述： | 50mA Ultra-Low Quiescent Current LDO Linear Regulator |
| 文件： | 总12页 (文件大小：952K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Description
Features
● Operating Voltages Range：+2.5V to +18V
The EC8841 series is a positive voltage regulator
with high accuracy output voltage and ultra-low
quiescent current which is typically 1.0μA. The
device is ideal for battery powered handheld
equipments which require low quiescent current.
The EC8841 contains a bandgap voltage reference,
an error amplifier, a P-channel pass transistor, and a
resistor-divider for setting output voltage. The output
voltage is fixed with high accuracy by advanced
trimming technology.
● Output Voltages Range：+1.5V to +5.0V with 100mV
Increment
● Low Dropout: 800mV @ 50mA
● High Output Voltage Accuracy±2%：Vout ≧2.7V
● Thermal Overload Shutdown Protection
● Low ESR Capacitor Compatible
● SOT23-3, SOT23-5, SOT89, TO92 Packages
● RoHS Compliant and 100% Lead (Pb)-Free and Green
(Halogen Free with Commercial Standard)
The EC8841 has been designed to be used with low
cost ceramic capacitors and requires a minimum
output capacitor of 1.0μF. The devices are available
in SOT23-3/5, SOT89 and TO92 packages
Applications
Battery powered equipments
Hand-Held Electronics
Portable Communication Devices
Wireless Communication systems
Precision Voltage Reference
Simplified Application Circuit
SOT89
SOT23 Series
E-CMOS Corp. (www.ecmos.com.tw)
Page 1 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Ordering Information
EC8841 XX XX X R
R:Tape & Reel
Circuit Type
Output Vol age(exam):
VOUT= 1.8V= 18
VOUT= 2.8V= 28
VOUT= 3.3V= 33
VOUT= 5.0V= 50
Pin Type: SOT89:L/Y
t
N
：Normal
Package Type：
B1=SOT23-3
B2=SOT23-5
B6= SOT89 3L
A6=TO92-3L
Package Part Number
Marking
Marking Information
8841V
TTTTT
8841V
TTTTT
8841V
TTTTL
8841V
TTTTY
8841V
TTTTT
Product part ： 8841
SOT23-3 EC8841XXB1NR
V is the output voltage of production.
Example:
SOT23-5 EC8841XXB2NR
EC8841XXB6LR( Pin Type：L)
8=1.5V;A=1.8V,K=2.8V;
M=3.0V;Q=3.3V.Z=5.0V
TTTTT：Lot No
SOT89
TO92
EC8841XXB6YR(Pin Type：Y)
EC8841XXA6NR
Pin Assignment & Pin Description
Pin Number
(SOT23-3)
Pin Name
Pin Description
1
2
3
GND
VOUT
VIN
GND Pin
Output Pin
Power Input
Pin Number
(SOT23-5)
Pin Name
Pin Description
1
2
3
4
5
GND
VIN
GND Pin
Power Input
Output Pin
VOUT
NC
No Connection
No Connection
NC
E-CMOS Corp. (www.ecmos.com.tw)
Page 2 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Pin Assignment & Pin Description
Pin Number
Pin Name
Pin Description
SOT89
SOT89
(Pin Type L)
(Pin Type Y)
1
2
3
1
3
2
GND
VIN
GND Pin
Power Input
Output Pin
VOUT
Pin Number
Pin Name
Pin Description
(TO92)
1
2
3
GND
VIN
GND Pin
Power Input
Output Pin
VOUT
Absolute Maximum Rating
Parameter
Symbol
VIN
IOUT
Value
Units
Input Voltage VIN to GND
20
V
Output Current Limit, I(LIMIT
100
350
350
550
550
mA
mW
mW
mW
mW
°C
)
SOT23-3
SOT23-5
SOT89
TO92
Power Dissipation
PD
Operating Ambient Temperature
Storage Temperature Range
TOPR
-40 to+125
-55 to +150
+260
TSTG
°C
—
Lead Temperature (Soldering, 10sec)
°C
Note:
*Stresses beyond those listed under ―absolute maximum ratings‖ may cause permanent damage to the device.These are stress ratings only,
and function operation of the device at these or any other conditions beyond those indicated under ―recommended operating
conditions‖ is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
E-CMOS Corp. (www.ecmos.com.tw)
Page 3 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Electrical Characteristics
(T =25°C, unless otherwise noted.)
A
Symbol
Parameter
Input Voltage
Test Conditions
Min
2.5
Typ
Max
18
Unit
V
VIN
VOUT
*
VOUT*
VIN=VOUT+1.0V, IOUT=1mA, VOUT≦2.6V
VIN=VOUT+1.0V, IOUT=1mA, VOUT≧2.7V
0.976
1.024
Output Voltage
V
VOUT
VOUT
VOUT
0.98
*
VOUT
1.02
*
IMAX
IQ
Maximum Load Current
Ground Pin Current
50
mA
µA
ILOAD=0mA , VIN=VOUT+1.0V
1.0
16
2.5
20
IOUT=1mA, VOUT=5V
IOUT=10mA, VOUT=5V
IOUT=50mA, VOUT=5V
VOUT+1.0V<VIN<12V, IOUT=1mA
IOUT=0mA to 50mA,
160
800
0.2
200
mV
Dropout Voltage
VDROP
1000
0.3
%/V
∆VLINE
Line Regulation
Load Regulation
%/mA
∆VLOAD
0.01
0.02
△VOUT
△TA
/
Temperature
0.6
mV/℃
VIN=5.0V, IOUT=10mA,TA=-40℃~125℃
Characteristic of △VOUT
Function Block Diagram
E-CMOS Corp. (www.ecmos.com.tw)
Page 4 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
APPLICATION CIRCUITS
Current Boost Circuit
The figure below shows a boost circuit for increasing
the output current. Output current 60mA or more can be
obtained by this circuit.
Where VSET is the preset output voltage of EC8841
and ISS is the quiescent current. Because of the low
quiescent current, the resistor values, R1 and R2,
can be set as large as several hundreds kΩ to
lower the power consumption of the whole system.
Constant Current Source
The EC8841 Series can be used as a constant
current source within allowable current limit.
Short-Circuit protection of Tr1 can be implemented
by adding the sense resistor RS and the PNP
transistor Tr2 as shown below.
The output current is obtained by:
The current limit of the protection circuit is:
Dual Supply
A dual supply can be constructed with two EC8841
series as show in the figure below. This circuit
provides two outputs (5V and 8V) with the EC884130 and
the EC884150. As the resistance R lets the quiescent
current of IC1 pass. R is unnece-ssary if the minimum
output current of IC2 is more than the IC1 quiescent
current. D is a protection diode in case VOUT2 becomes
Voltage Boost Circuit
If the output voltage you need is greater than 5.0V,
the circuit in the figure below will increase output
voltages easily
larger than VOUT1
.
The output voltage is obtained by:
E-CMOS Corp. (www.ecmos.com.tw)
Page 5 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Detail Description
The EC8841 is a low quiescent current LDO linear
regulator. It supplies a preset 3.3V, 3.6V and 5.0V
output voltages for output current up to 50mA.
Other mask options for special output voltages
from 1.5V to 5.0V with 100mV increment are also
available. As illustrated in function block diagram, it
consists of a 1.23V band gap reference, error
amplifier, P-channel pass transistor and an internal
feedback voltage divider.
The 1.23V band gap reference is connected to the
error amplifier, which compares this reference with
the feedback voltage and amplifies the voltage
difference. If the feedback voltage is lower than the
reference voltage, the pass-transistor gate is pulled
lower, which allows more current to pass to the
output pin and increases the output voltage. If the
feedback voltage is too high, the pass-transistor
gate is pulled up to decrease the output voltage.
The output voltage is feedback through an internal
resistor-divider connected to OUT. Additional blocks
include an output current limiter, thermal sensor,
and shutdown logic.
Internal P-channel Pass Transistor
The EC8841 features a P-channel MOSFET pass
transistor. Unlike similar designs using PNP pass
transistors, P-channel MOSFETs require no base
drive,which reduces ground pin current.PNP-
based regulators also waste considerable current
in dropout conditions when the pass transistor
saturates,and use high base-drive currents under
large loads.The EC8841 does not suffer from
these problems and consumes only 1.0μA (Typ.) of
ground pin current under heavy loads as well as in
dropout conditions.
Output Voltage Selection
The first two digits of part number suffix identify the
output voltage(see Ordering Information).For example,
the EC884150 has a preset 5.0V output voltage.
Input-Output Voltage
A regulator’s minimum input-output voltage differential,
or dropout voltage,determines the lowest usable
supply voltage.In battery-powered systems,this will
determine the useful end-of-life battery voltage.
The EC8841 uses a P-channel MOSFET pass
transistor,its dropout voltage is a function of drain-to-
source on-resistance (RDS(ON))multiplied by the load
current.
VDROPOUT VIN VOUT RDS IOUT
ON
E-CMOS Corp. (www.ecmos.com.tw)
Page 6 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Typical Operating Characteristics
(EC884136A6NR tested, CIN=1.0μF, COUT=1.0μF, TA=+25℃, unless otherwise noted.)
E-CMOS Corp. (www.ecmos.com.tw)
Page 7 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Mechanical Dimensions
OUTLINE DRAWING SOT23-3
E-CMOS Corp. (www.ecmos.com.tw)
Page 8 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Mechanical Dimensions
OUTLINE DRAWING SOT23-5
E-CMOS Corp. (www.ecmos.com.tw)
Page 9 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Mechanical Dimensions
OUTLINE DRAWING SOT-89
E-CMOS Corp. (www.ecmos.com.tw)
Page 10 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Mechanical Dimensions
OUTLINE DRAWING TO-92
E-CMOS Corp. (www.ecmos.com.tw)
Page 11 of 12
3I03N Rev. P001
50mA Ultra-Low Quiescent Current LDO
Linear Regulator
EC8841
Table 2. Pb-free / Green Process – Package Classification Reflow Temperatures
Volume mm³
<350
Volume mm³
350~2000
Volume mm³
2000
Package Thickness
≧
<2.5 mm
1.6-2.5 mm
≧2.5 mm
260 +0°C*
260 +0°C*
250 +0°C*
260 +0°C*
250 +0°C*
245 +0°C*
260 +0°C*
245 +0°C*
245 +0°C*
Notes：
* Tolerance: The device manufacturer/supplier shall assure process compatibility up to and including the stated
classification temperature (this means Peak reflow temperature +0°C. For example 260°C+0°C) at the rated
MSL level.
E-CMOS Corp. (www.ecmos.com.tw)
Page 12 of 12
3I03N Rev. P001
相关型号：
©2020 ICPDF网 联系我们和版权申明