EC8806VVB2R [E-CMOS]
Ultra-Low Noise Ultra-Fast 300mA LDO Regulator;
| 型号： | EC8806VVB2R |
| 厂家： | 
E-CMOS Corporation |
| 描述： | Ultra-Low Noise Ultra-Fast 300mA LDO Regulator |
| 文件： | 总13页 (文件大小：691K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
General Description
The EC8806 is a 300mA, low dropout and low noise
linear regulator with high ripple rejection ratio and fast
turn-on time. It has fixed and adjustable versions with
output voltage ranging from 1.5V to 5V.
Features
Ultra-Low-Noise Application
Wide 2.5V to 7V Operating Range
Quick Start-up
The EC8806 includes a reference voltage source, an
error amplifier, driver transistors and an internal
current limiter. The current limiter’s holdback circuit
operates as a short protection.
Current Limiting Protection
Thermal Shutdown Protection
Low Dropout : 200mV @ 300mA
High Ripple Rejection 70dB@1kHz
Standby Current Less Than 0.1μA
Seven Fixed Voltage Options Available
The EC8806 works well with low ESR ceramic
capacitors, suitable for portable RF and wireless
battery-powered applications with stringent space
requirements and demanding performance. It also
offers ultra low noise output and has low quiescent
current.
Applications
Battery-Powered Equipment
Portable Instruments
Digital Camera
WLAN Communication
Hand-Held Instruments
Ordering Information
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 1 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Marking Information
Marking
Package
Type
Device
Remarks
Information
1. VV：Output Voltage(Ex：15：1.5V;33：3.3V)
2. Y：Year code(D=2013;E=2014;F=2015…)
3. W：Week Code(The big character of A~Z is for the week of
1~26, and small a~z is for the week of 27~52.)
8806
VVYW
EC8806VVB2R
SOT23-5
1. VV：Output Voltage(Ex：15：1.5V;33：3.3V)
2. Starting with underlined first-V, a bar is for production year 2012.
The next bar is mark on top of second-V is for year 2013. The
next bar is mark on bottom of second-V is for year 2014.The next
bar is mark on top of f is year for 2015. The naming pattern
continues with consecutive characters for later years.
EC8806VVC5R
6VVf
SC70-5
3. f is the week of production. The big character of A~Z is for the
week of 1~26, and small a~z is for the week of 27~52.
Typical Application Circuit
VIN
VIN
VOUT
VOUT
CIN=1µF
COUT=1µF
Enable
EN
BP
10nF(Optional)
100K
Figure 1. Fixed Voltage BP Version
VIN
VIN
EN
VOUT
ADJ
VOUT
COUT=1µF
CIN=1µF
R1
R2
Enable
100K
R1
R2
VOUT 1.2 1
Volts
Figure 2. Adjustable Voltage Version
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 2 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Absolute Maximum Ratings (Note1)
Recommended Operating Conditions
Supply Voltage VIN
Power Dissipation, PD @ TA=25°C
SC70-5
7V
Input Voltage VIN
2.5V to 7V
EN Input Voltage
0V to 6V
300mW
400mW
Junction Temperature
Ambient Operating Temperature
-40°C to 125°C
-40°C to 85°C
SOT23-5
Thermal Resistance, ja
SC70-5
333°C/W
250°C/W
260 °C
SOT23-5
Lead Temperature
Storage Temperature
-65°C to 150°C
Electrical Characteristics (Unless otherwise specified VIN=5V, TA=25°C)
Parameters
Symbol
Condition
Min Typ Max Units
Operating Voltage Range
(Note 2)
Standby Current
Supply Current Limit
VIN
7
1
V
ISBY
ILIMIT
VEN = GND,Shutdown
RLOAD = 1Ω
0.01
450
1300
1100
580
410
300
260
200
0
μA
mA
mV
mV
mV
mV
mV
mV
mV
nA
360
VOUT = 1.2V
VOUT = 1.8V
VOUT = 2.5V
2100
1500
800
500
400
370
300
100
Dropout Voltage (Note 3)
VDROP
IOUT = 300mA VOUT = 2.8V
VOUT = 3.0V
VOUT = 3.1V
VOUT = 3.3V
VEN = GND or VIN
VIN = (VOUT +1V) to 5.5V
IOUT = 1mA
1mA < IOUT < 300mA
10Hz to 100kHz
IOUT = 200mA COUT = 1μF
EN input Bias Current
Line Regulation
IIBSD
ΔVLINE
ΔVLOAD
eNO
10
25
mV/V
mV
Load Regulation
15
Output Noise Voltage
100
μVRMS
Thermal Shutdown
Temperature
Thermal Shutdown
Temperature Hysteresis
Output Voltage Accuracy
°C
°C
TSD
165
30
ΔTSD
ΔVOUT
VIL
VIH
IOUT =1mA
VIN = 3V to 5.5V,Shutdown
VIN = 3V to 5.5V,Start-up
-2
+2
0.4
%
V
V
Logic-Low V
Logic-High V
f = 100Hz
EN Threshold
1.2
-70
-65
Power Supply
Rejection Rate
PSRR
COUT = 1μF, IOUT = 10mA
dB
f = 10KHz
Note 1: Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These
are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2: VIN (MIN) = VOUT+VDROPOUT
Note 3: The dropout voltage is defined as (VIN-VOUT) when VOUT is 100mV below the target value of VOUT
.
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 3 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Pin Configurations
(Top View)
Pin Description
Pin Name Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ
resistor connected to GND when the control signal is floating.
EN
GND
VOUT
VIN
Ground
Output Voltage
Input Voltage
BP
Bypass Pin
ADJ
Feedback Input, this pin could not be floating.
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 4 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Function Block Diagram
Shutdown
and
Logic Control
EN
BP
VIN
VREF
-
MOS Driver
+
Error
Amplifier
VOUT
Current-Limit
and
Thermal
Protection
GND
Figure3. BP Version
Shutdown
and
EN
VIN
Logic Control
VREF
-
MOS Driver
+
Error
Amplifier
VOUT
ADJ
Current-Limit
and
Thermal
Protection
GND
Figure4. ADJ Version
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 5 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Typical Operating Characteristics
Quiescent Current vs. Input Voltage
Current Limit vs. Input Voltage
95
90
85
80
75
800
700
600
500
400
VOUT = 2.8V
VIN = EN
VOUT = 2.8V
VOUT Connect 1Ω to GND
3
3.5
4
4.5
5
5.5
6
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Input Voltage (V)
Shutdown Current vs. Input Voltage
Dropout Voltage vs. Load Current
0.06
300
250
200
150
100
50
0.05
0.04
0.03
0.02
0.01
0
VOUT = 2.8V
EN = 0V
VOUT = 2.8V
0
50
100
150
200
250
300
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Load Current (mA)
Load Regulation
Line Regulation
2.825
2.815
2.805
2.795
2.785
2.775
2.85
2.83
2.81
2.79
2.77
2.75
VIN = 5V
ILOAD= 1mA
VIN = 3.3V
ILOAD= 300mA
VOUT = 2.8V
VOUT = 2.8V
5.5 6
3
3.5
4
4.5
5
0
50
100
150
200
250
300
Load Current (mA)
Input Voltage (V)
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 6 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
PSRR
80
70
60
50
40
VOUT 2.8V, ILOAD=10mA
VOUT 2.8V, ILOAD=50mA
VIN =Vout+1V =EN
CIN=COUT=1F
CBP=10nF
100
1K
10K
100K
Frequency (Hz)
Start-up from EN
Start-up from EN
EN-DC
EN-DC
(1V/Div)
(1V/Div)
VOUT -DC
(2V/Div)
VOUT -DC
(1V/Div)
VIN = 3.8V
VIN = 3.8V
VOUT = 2.8V
ILOAD = 0mA
VOUT = 2.8V
ILOAD = 300mA
Time (200μs/Div)
Shutdown from EN
Time (20μs/Div)
Shutdown from EN
EN -DC
(1V/Div)
EN -DC
(1V/Div)
VOUT -DC
(2V/Div)
VOUT -DC
(2/Div)
VIN = 3.8V
VIN = 3.8V
VOUT = 2.8V
ILOAD = 0mA
VOUT = 2.8V
ILOAD = 300mA
Time (100μs/Div)
Time (10μs/Div)
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 7 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Load Transient Response
Load Transient Response
VOUT -AC
VOUT -AC
(20mV/Div)
(20mV/Div)
9mV
12.2mV
ILOAD -DC
ILOAD -DC
VIN = EN = 3.8V
ILOAD = 1mA to 150mA
VIN = EN = 3.8V
ILOAD =1mA to 300mA
(100mA/Div)
(200mA/Div)
Time (200μs/Div)
Time (200μs/Div)
Line Transient Response
Line Transient Response
VIN
VIN
(1V/Div)
(1V/Div)
7.6 mV
7.8 mV
VOUT
VOUT
(20mV/Div)
(20mV/Div)
VIN = 4.0V to 5.0V, ILOAD = 1mA
VIN = 4.0V to 5.0V, ILOAD = 300mA
Time (1ms/Div)
Time (1ms/Div)
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 8 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Application Information
Capacitor Selection and Regulator Stability
Input Capacitor
An input capacitance of 1μF is required between the device input pin and ground directly (the amount of the
capacitance may be increased without limit). The input capacitor MUST be located less than 1 cm from the device
to assure input stability (see PCB Layout Section). A lower ESR capacitor allows the use of less capacitance, while
higher ESR type (like aluminum electrolytic) requires more capacitance. Capacitor types (aluminum, ceramic and
tantalum) can be mixed in parallel, but the total equivalent input capacitance/ESR must be defined as above for
stable operation. There are no requirements for the ESR on the input capacitor, but tolerance and temperature
coefficient must be considered when selecting the capacitor to ensure the capacitance is 1μF over the entire
operating range.
Output Capacitor
The EC8806 is designed specifically to work with very small ceramic output capacitors. The minimum capacitance
recommended (temperature characteristics of X7R, X5R, Z5U or Y5V) is within the 1μF to 10μF range with 5mΩ to
50mΩ ESR range ceramic capacitor between LDO output and GND for transient stability, but it may be increased
without limit. Higher capacitance values help to improve transient response. The output capacitor's ESR is critical
because it forms a zero to provide phase lead which is required for loop stability.
Enable Function
The EC8806 is shut down by pulling the EN pin low, and turned on by driving the input high. If the shutdown feature
is not required, the EN pin should be tied to VIN to keep the regulator on at all times (the EN pin MUST NOT be left
floating).
To assure proper operation, the signal source used to drive the EN pin must be able to swing above and below the
specified turn-on/off voltage thresholds listed in the “Electrical Characteristics” under VIH and VIL. The ON/OFF
signal may come from either CMOS output, or an open-collector output with pull-up resistor to the device input
voltage or another logic supply. The high-level voltage may exceed the device input voltage, but must remain within
the absolute maximum ratings for the EN pin.
Adjustable Operation
The adjustable version of the EC8806 has an output voltage ranging from 1.2V to 4.75V. The output voltage of the
EC8806 adjustable regulator is programmed using an external resistor divider as shown in Figure 5. The output
voltage can be calculated using:
R1
VOUT 1.2 1
R2
Fig. 5
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 9 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
Where:
VREF= 1.2V TYP. (the internal reference voltage)
To enable default output voltage (pre-set), connect ADJ pin to ground. There is no external component needed to
decide voltage.
Operating Region and Power Dissipation
Since the EC8806 is a linear regulator, its power dissipation is always given by P = IOUT (VIN – VOUT). The maximum
power dissipation is given by: PD(MAX) = (TJ–TA) /θJA =(125°C -25°C)/250°C /W = 500mW Where (TJ–TA) is the
temperature difference the EC8806 die and the ambient air, θJA is the thermal resistance of the chosen package to
the ambient air. For surface mount device, heat sinking is accomplished by using the heat spreading capabilities of
the PC board and its copper traces. In the case of a SOT23-5 package, the thermal resistance is typically 240°C
/Watt. Refer to Figure 6 & 7 for the EC8806 valid operating region (Safe Operating Area) and refer to Figure 8 for
maximum power dissipation information of SOT23-5.
The die attachment area of the EC8806 lead frame is connected to pin 2, which is the GND pin. Therefore, the
GND pin of EC8806 can dissipate the heat from the die very effectively. To improve the maximum power providing
capability, connect the GND pin to ground using a large ground plane near the GND pin.
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 10 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 11 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
OUTLINE DRAWING SC70-5
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 12 of 13
Ultra-Low Noise Ultra-Fast 300mA LDO
Regulator
EC8806
OUTLINE DRAWING SOT23-5
E-CMOS Corp. (www.ecmos.com.tw)
4L03N-Rev.F001
Page 13 of 13
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