E-CMOS EC8811 1a adjustable & fixed voltage ldo linear regulator Datasheet

EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Features
General Description
Operating Voltage Range：
：+2.3V to +7.0V
Output Voltages：
：+1.0V to +5.0V (0.1V Step)
(Fixed), +1.25V to +5.0V (ADJ Type)
Maximum Output Current：
：1A
Dropout Voltage：
：700mV @ 1000mA (Fixed)
Fast Response in Power-on
(Fixed Voltage Only)
Low Current Consumption：
：60µA (Typ.)
±2% Output Voltage Accuracy (special ±1%
highly accurate), VOUT≧1.8V
Low ESR Capacitor Compatible
High Ripple Rejection：
：55 dB (Typ.)
Output Current Limit Protection：
：1.3A (Typ.)
Short Circuit Protection：
：600mA (Typ.)
Thermal Overload Shutdown Protection
SOT-223, TO-252, TO-263 Packages
RoHS Compliant and 100% Lead (Pb)-Free
The EC8811 series is a low-dropout linear regulator
that operates in the input voltage range from +2.3V
to +7.0V and delivers 1.0A output current.
The EC8811 is available in two types, fixed
output voltage type and adjustable output voltage
type. The fixed output voltage type is preset at an
internally trimmed voltage 1.0V,1.2V,1.8V, 2.5V, or
3.3V. Other options 1.2V, 1.5V, 2.85V, 3.0V and
3.6V are available by special order only. The output
voltage range of the adjustable type is from 1.25V
to 5V.
The EC8811 (ADJ type) consists of a 1.25V
band-gap reference, an error amplifier, and a
P-channel pass transistor. Other features include
short-circuit protection and thermal shutdown
protection.
The EC8811 (Fixed type) consists of a 0.95V
band-gap reference, an error amplifier, and a
P-channel pass transistor. Other features include
short-circuit protection and thermal shutdown
protection. The EC8811 series devices are
available in SOT-223, TO-252, TO-263 packages.
and Green (Halogen Free with Commercial
Standard)
Applications
●
Active SCSI Terminators
●
Low Voltage Micro-Controllers
●
High Efficiency Linear Regulators
●
Post Regulator for Switching Power
●
Monitor Microprocessors
Simplified Application Circuit
E-CMOS Corp. (www.ecmos.com.tw)
Page: 1/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Ordering Information
EC8811 Output Voltage Accuracy
Lead Free Code
Pin Name Code
Package Code
Vout Code
Vout Code：
：
10=1.0V,12=1.2V,18=1.8V, 25=2.5V, 33=3.3V,ADJ=ADJ
Package Code：
：
SOT-223 = B7
TO-252 = A4
TO-263 = A8
Pin Name Code :
SOT-223 = J ’ G ‘ X
TO-252 = P ‘ R
TO-263 = U
Lead Free Code：
：G：Green (Halogen Free with Commercial Standard)
Output Voltage Accuracy：
：
1：±1%
Note：
2：±2%
* The difference between “J”, “G” & “X” type and “P” & “R” type, please refer to ”Pin Description”.
Pin Description
Pin
Part NO.
SOT-223
TO-252
Part NO.
Pin Description
G
X
3
1
3
VIN
1
2
2
GND/ADJ
Ground Pin or ADJ Terminal Pin.
2
3
1
VOUT
Regulator Output Pin.
Symbol
Pin Description
Regulator Input Pin.
Pin
Part NO.
( TOP View )
Symbol
J
Regulator Input Pin.
P
R
1
3
VIN
2
1
GND/ADJ
3
2
VOUT
Regulator Output Pin.
Symbol
Pin Description
Pin
Ground Pin.
U
TO-263
E-CMOS Corp. (www.ecmos.com.tw)
3
VIN
Regulator Input Pin.
1
GND/ADJ
Ground Pin.
2
VOUT
Regulator Output Pin.
Page: 2/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Package Marking Information
EC8811
EC8811
EC8811
1 2 3 4 5 6 7
1 2 3 4 5 6 7
1 2 3 4 5 6 7
1
2
3
SOT-223
(Top View)
2
1
2
3
TO-252
(Top View)
1
3
TO-263
(Top View)
Top Point Represents Products Series
Mark
Products Series
Top Point
Part No.：EC8811
1 、○
2 、○
3 、○
4 、○
5 Represents Products Series
○
1 、○
2
○
3
○
4
○
5
○
6 、○
7
○
6
○
Mark
Voltage
F, G
J, G, X, P, R,U
Description
Voltage Code or Blank for Adjustable
Lead Free or Green Code
Pin name Code
1 (±1%) or 2 (±2%)
Accuracy
Represents Production Date Code
7
○
Year
16 bit code ‘ 08 = 8’ 09 = 9’ 10 = A’
11 = B’ 12 = C….16 = F
1 ~ 26 = A ~ Z ‘ 27 ~ 52 = a ~ z
weekly
Example：
：
EC8811
33GJ27w
E-CMOS Corp. (www.ecmos.com.tw)
EC8811-33B7JG2
EC8811
GJ27w
Page: 3/16
EC8811-ADJB7JG2
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Units
Input Voltage VIN to GND
Output Current Limit, I(LIMIT)
Junction Temperature
SOT-223
TO-252
SOT-263
Thermal Resistance
SOT-223
TO-252
SOT-263
SOT-223
Power Dissipation
TO-252
SOT-263
Operating Ambient Temperature
Storage Temperature
Lead Temperature (soldering, 10sec)
VIN
IOUT
TJ
9.0
1.3
+155
155
90
30
16
11
6.5
900
1200
3300
-40 ~ +85
-55 ~ +150
+260
V
A
°C
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
θJA
θJC
PD
TOPR
TSTG
mW
°C
°C
°C
Note：
* The power dissipation values are based on the condition that junction temperature TJ and ambient
temperature TA difference is 100°C.
* 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: 4/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Electrical Characteristics
(VIN=5V, TA=25℃, unless otherwise noted.)
Symbol
VIN
Parameter
Test Conditions
Input Voltage
Fixed
Voltage
Type
VOUT
Output Voltage
IMAX
Output Current
(see note *1)
ILIMIT
Current Limit
VDROP
Dropout Voltage
( For Fixed Voltage)
Dropout Voltage
( For ADJ Voltage)
VIN = VOUT+1.0V, IOUT=1mA,
VOUT≧1.8V
Line Regulation
∆VLOAD Load Regulation
IQ
Typ
Max Unit
2.3
7.0
V
-1%
-2%
+1%
+2%
V
+35
mV
VIN = VOUT+1.0V, IOUT=1mA,
-35
VOUT＜1.8V, VIN＞2.4V
VOUT
VIN = VOUT+1.2V, IOUT=1mA,
-1%
-1%
Adjustable VOUT≧1.8V
-2%
-2%
Voltage
VOUT
VIN = VOUT+1.2V, IOUT=1mA,
Type
-50
+50
VOUT＜1.8V, VIN＞2.4V
V
mV
1.0
A
1.3
A
IOUT=100mA, VOUT＞3.0V
50
mV
IOUT=500mA, VOUT＞3.0V
300
mV
IOUT=1000mA, VOUT＞3.0V
700
mV
IOUT=1000mA, VOUT＞3.0V
1100
mV
VOUT+1.0V≦VIN≦7.0V, IOUT=1mA
For Fixed Voltage Type
∆VLINE
Min
0.2
0.3
%/V
VOUT+1.2V≦VIN≦7.0V, IOUT=1mA,
VIN≧2.8V
For Adjustable Voltage Type
0.2
%/V
VIN=VOUT+1V, 1mA≦IOUT≦100mA
0.01 0.02 %/mA
Ground Pin Current
ILOAD=0mA to 1A, VIN = VOUT+1.0V
60
µA
IADJ
ADJ Pin Current
ILOAD=0mA to 1A, VIN = VOUT+1.0V
60
µA
ISC
Short Circuit Current
600
mA
IOUT=30mA, F=1KHz, COUT=10uF
55
dB
IOUT=100mA , F=1KHz, COUT=10uF
40
µV(rms)
155
°C
20
°C
PSRR Ripple Rejection
eN
TSD
THYS
Output Noise
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
Note：
*1) Measured using a double sided board with 1” x 2” square inches of copper area connected to the GND pins
for “heat spreading”.
E-CMOS Corp. (www.ecmos.com.tw)
Page: 5/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
EC8811 Function Block Diagram
Fixed Voltage Type
Adjustable Voltage Type
E-CMOS Corp. (www.ecmos.com.tw)
Page: 6/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Detail Description
The EC8811 is a low-dropout linear regulator. The
device provides preset 1.8V, 2.5V and 3.3V output
voltages for output current up to 1.0A. Adjustable
output voltage and other mask options for special
output voltages are also available. As illustrated in
function block diagram, it consists of a 1.25V
bandgap (Fixed voltage type is 0.95V) reference,
an error amplifier, a P-channel pass transistor and
an internal feedback voltage divider.
For adjustable voltage type of EC8811, the output
voltage is set by comparing the feedback voltage
at adjust terminal to the internal bandgap
reference voltage. The reference voltage VREF is
1.25V. The output voltage is given by the equation:
R2 

VOUT = VREF ×  1 +
 + I ADJ × R 2
R1 

(See Typical Application Schematic.)
The bandgap reference voltage 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.
Current Limit
The EC8811 also includes a fold back current
limiter. It monitors and controls the pass transistor’s gate voltage, estimates the output current,
and limits the output current within 1.3A (Typ.).
Thermal Overload Protection
The output voltage is feed back through an internal
resistive divider (or external resistive divider for
adjustable output voltage type) connected to OUT
pin. Additional blocks include an output current
limiter, thermal sensor, and shutdown logic.
Internal P-channel Pass Transistor
The EC8811 features a P-channel MOSFET pass
transistor. Unlike similar designs using PNP pass
transistors, P-channel MOSFETs require no base
drive, which reduces quiescent current. PNP-based regulators also waste considerable current in
dropout when the pass transistor saturates, and
use high base-drive currents under large loads.
The EC8811 does not suffer from these problems
and consumes only 60µA (Typ.) of current consumption under heavy loads as well as in dropout
conditions.
Output Voltage Selection
For fixed voltage type of EC8811, the output
voltage is preset at an internally trimmed voltage.
The first two digits of part number suffix identify the
output voltage (see Ordering Information). For
example, the EC8811-33 has a preset 3.3V output
voltage.
Thermal overload protection limits total power
dissipation in the EC8811. When the junction
temperature exceeds TJ = +150°C, a thermal
sensor turns off the pass transistor, allowing the IC
to cool down. The thermal sensor turns the pass
transistor on again after the junction temperature
cools down by 20°C, resulting in a pulsed output
during continuous thermal overload conditions.
Thermal overload protection is designed to protect
the EC8811 in the event of fault conditions. For
continuous operation, the absolute maximum operating junction temperature rating of TJ = +125°C
should not be exceeded.
Operating Region and Power Dissipation
Maximum power dissipation of the EC8811
depends on the thermal resistance of the case and
circuit board, the temperature difference between
the die junction and ambient air, and the rate of
airflow. The power dissipation across the devices is
P = IOUT x (VIN-VOUT). The resulting maximum
power dissipation is:
PMAX =
E-CMOS Corp. (www.ecmos.com.tw)
Page: 7/16
( T J − T A ) = ( TJ
θ JC + θ CA
− TA )
θA
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Where (T J-T A ) is the temperature difference
between the EC8811 die junction and the
surrounding air, θJC is the thermal resistance of
the package chosen, and θCA is the thermal
resistance through the printed circuit board,
copper traces and other materials to the
surrounding air. For better heat-sinking, the
copper area should be equally shared between
the IN, OUT, and GND pins.
Dropout 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 EC8811 use 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.
V DROPOUT = V IN − V OUT = R DS (ON ) × I OUT
E-CMOS Corp. (www.ecmos.com.tw)
Page: 8/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Typical Operating Characteristics
E-CMOS Corp. (www.ecmos.com.tw)
Page: 9/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
(7) Input Transient Response
(8) Load Transient Response
E-CMOS Corp. (www.ecmos.com.tw)
Page: 10/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
(9) Power Supply Rejection Ratio
Application Note
Table 1.θJA Different Heatsink Area
Layout
Copper Area
2
Thermal Resistance
2
Top Side (in )
Bottom Side (in )
SOT-223 (θJA, ℃/W)
TO-252 (θJA, ℃/W)
a
0
0
140
106
b
0
0.070
127
91
c
0
0.310
84
64
d
0.067
0.067
125
89
e
0.200
0.080
118
87
f
0.600
0.080
89
63
g
0.285
0.285
92
64
h
0.393
0.393
78
58
i
0.500
0.500
73
55
E-CMOS Corp. (www.ecmos.com.tw)
Page: 11/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Package Outline
A) SOT-223
Symbols
A
A1
A2
b
b1
C
D
E1
e
e1
E
L
L2
α
E-CMOS Corp. (www.ecmos.com.tw)
Millimeters
Min
Max
1.52
1.80
0.02
0.10
1.50
1.70
0.60
0.80
2.90
3.10
0.24
0.32
6.30
6.80
3.30
3.70
2.30 BSC
4.60 BSC
6.70
7.30
0.90 MIN
0.06 BSC
0°
10°
Page: 12/16
Inches
Min
Max
0.061
0.071
0.0008
0.0040
0.059
0.067
0.024
0.031
0.114
0.122
0.009
0.013
0.248
0.268
0.130
0.146
0.090 BSC
0.181 BSC
0.264
0.287
0.036 MIN
0.0024 BSC
0°
10°
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
B) TO-252
A
A1
A2
b
C
D
E
E1
e
e1
F
Millimeters
Min
Max
2.19
2.38
0.89
1.27
0.00
0.13
0.51
0.89
0.46
0.58
5.97
6.22
6.35
6.73
5.21
5.46
2.28 BSC
3.96
5.18
0.46
0.58
Min
Max
0.086
0.094
0.035
0.050
0.000
0.005
0.020
0.035
0.018
0.023
0.235
0.245
0.250
0.265
0.205
0.215
0.090 BSC
0.156
0.204
0.018
0.023
L
L1
1.40
1.78
2.67 (REF.)
0.055
0.070
0.105 (REF.)
L2
L3
0.64
1.52
0.025
0.060
L4
H
θ
0.51 BSC
9.40
10.40
0°
8°
Symbols
E-CMOS Corp. (www.ecmos.com.tw)
Page: 13/16
1.02
2.03
Inches
0.040
0.080
0.020 BSC
0.370
0.410
0°
8°
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
C) TO-263
A
A1
A2
b
b1
C
Millimeters
Min
Max
4.30
4.70
1.22
1.40
2.64
2.69
0.69
0.94
1.22
1.40
0.36
0.56
Min
0.169
0.048
0.104
0.027
0.048
0.014
Max
0.185
0.055
0.106
0.037
0.055
0.022
D
E
e
e1
H
L
8.64
9.70
2.29
4.83
14.60
4.70
9.652
10.54
2.79
5.33
15.87
5.84
0.340
0.382
0.090
0.190
0.575
0.185
0.380
0.415
0.110
0.210
0.625
0.230
L1
L2
1.19
2.24
1.778
2.82
0.047
0.088
0.070
0.111
Symbols
L3
E-CMOS Corp. (www.ecmos.com.tw)
Inches
1.40 MAX
0.055 MAX
θ
0°
8°
B
0.00
0.15
Page: 14/16
0°
8°
0.000
0.006
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Reflow Condition (IR/Convection or VPR Reflow)
Classification Reflow Profiles
Profile Feature
Pb-Free / Green Assembly
Average ramp-up rate
(TL to TP)
3°C/second max
Preheat
- Temperature Min (Tsmin)
- Temperature Max (Tsmax)
- Time (min to max) (ts)
150°C
200°C
60-180 seconds
Time maintained above:
- Temperature (TL)
- Time (tL)
217°C
60-150 seconds
Peak/Classification Temperature (Tp)
See table 1
Time within 5°C of actual
20-40 seconds
Peak Temperature (tp)
6°C/second max
Ramp-down Rate
Time 25°C to Peak Temperature
8 minutes max
Notes：
1) All temperatures refer to topside of the package.
2) Measured on the body surface.
E-CMOS Corp. (www.ecmos.com.tw)
Page: 15/16
4H15N-Rev. F001
EC8811
1A Adjustable & Fixed Voltage LDO Linear Regulator
Classification Reflow Profiles (Continued)
2.0Table 1. Pb-free / Green Process – Package Classification Reflow Temperatures
Package Thickness
<2.5 mm
1.6-2.5 mm
≧2.5 mm
Volume mm³
Volume mm³
Volume mm³
<350
350~2000
≧2000
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 rat ed
MSL level.
E-CMOS Corp. (www.ecmos.com.tw)
Page: 16/16
4H15N-Rev. F001