MIC5305-4.75YML [MICREL]
150mA μCap Ultra-Low Dropout LDO Regulator; 150毫安μCap超低压差LDO稳压器
| 型号： | MIC5305-4.75YML |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 150mA μCap Ultra-Low Dropout LDO Regulator |
| 文件： | 总12页 (文件大小：346K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5305
150mA µCap Ultra-Low Dropout
LDO Regulator
General Description
Features
The MIC5305 is a high-performance, 150mA LDO regula-
tor, offering extremely high PSRR and very low noise while
consuming low ground current.
• Ultra-low dropout voltage of 60mV @ 150mA
• Input voltage range: 2.25 to 5.5V
• Stable with ceramic output capacitor
• 150mA guaranteed output current
• Low output noise — 20µVrms
• Low quiescent current of 90µA total
• High PSRR, up to 85dB @1kHz
• Less than 30µs turn-on time w/CBYP = 0.01µF
• High output accuracy:
Ideal for battery-operated applications, the MIC5305
features 1% accuracy, extremely low-dropout voltage
(60mV @ 150mA), and low ground current at light load
(typically 90µA). Equipped with a logic-compatible enable
pin, the MIC5305 can be put into a zero-off-mode current
state, drawing no current when disabled.
The MIC5305 is a µCap design operating with very small
ceramic output capacitors for stability, thereby reducing
required board space and component cost.
–
–
±1.0% initial accuracy
±2.0% over temperature
• Thermal shutdown protection
• Current limit protection
The MIC5305 is available in fixed output voltages and
adjustable output voltages in the super-compact 6-pin
2mm × 2mm MLF® leadless package, our new ultra-thin
6-pin 2mm × 2mm Thin MLF® and thin SOT-23-5 package.
Additional voltage options are available. Contact Micrel
marketing.
• Tiny 6-pin 2mm × 2mm MLF® package
• Ultra-Thin 6-pin 2mm × 2mm Thin MLF® package
• Thin SOT-23-5 package
Applications
• Cellular phones
• PDAs
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
• Fiber optic modules
• Portable electronics
• Notebook PCs
• Audio Codec power supplies
Typical Application
Dropout Voltage
70
60
50
40
30
20
10
0
MIC5305
3.0V
VIN
2.85V@150mA
VOUT
VIN VOUT
0
20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
1µF
EN
BYP
GND
0.1µF
1µF
PSRR
(Bypass Pin Cap = 0.1µF)
100
90
80
70
60
50
40
30
20
10
0
150mA
50mA
100µA
0.1
1
10
100
1k
FREQUENCY (kHz)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-062507
June 2007
1
Micrel, Inc.
MIC5305
Ordering Information
Part Number
Standard
Marking
Junction
Voltage
Package
Temp. Range(1)
Pb-Free
Standard Pb-Free*
MIC5305-1.5BML
MIC5305-1.8BML
MIC5305-1.5YML
MIC5305-1.8YML
MIC5305-2.0YML
MIC5305-2.5YML
MIC5305-2.6YML
MIC5305-2.7YML
MIC5305-2.8YML
MIC5305-2.85YML
MIC5305-2.9YML
MIC5305-3.0YML
MIC5305-3.3YML
MIC5305-4.75YML
MIC5305YML
815
818
815
818
1.5V
1.8V
2.0V
2.5V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
3.3V
4.75V
ADJ
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
6-Pin 2x2 MLF®
820
MIC5305-2.5BML
MIC5305-2.6BML
MIC5305-2.7BML
MIC5305-2.8BML
MIC5305-2.85BML
MIC5305-2.9BML
MIC5305-3.0BML
MIC5305-3.3BML
MIC5305-4.75BML
MIC5305BML
825
826
827
828
82J
829
830
833
84H
8AA
825
826
827
828
82J
829
830
833
84H
8AA
828**
846**
N815
N818
N825
N826
N827
N828
N82J
N829
N830
N833
N84H
MIC5305-2.8YMT
MIC5305-4.6YMT
MIC5305-1.5YD5
MIC5305-1.8YD5
MIC5305-2.5YD5
MIC5305-2.6YD5
MIC5305-2.7YD5
MIC5305-2.8YD5
MIC5305-2.85YD5
MIC5305-2.9YD5
MIC5305-3.0YD5
MIC5305-3.3YD5
MIC5305-4.75YD5
2.8V
4.6V
1.5V
1.8V
2.5V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
3.3V
4.75V
–40°C to +125°C 6-Pin 2x2 Thin MLF®
–40°C to +125°C 6-Pin 2x2 Thin MLF®
MIC5305-1.5BD5
MIC5305-1.8BD5
MIC5305-2.5BD5
MIC5305-2.6BD5
MIC5305-2.7BD5
MIC5305-2.8BD5
MIC5305-2.85BD5
MIC5305-2.9BD5
MIC5305-3.0BD5
MIC5305-3.3BD5
MIC5305-4.75BD5
Note:
N815
N818
N825
N826
N827
N828
N82J
N829
N830
N833
N84H
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
Thin SOT23-5
1. For other output voltage options, contact Micrel marketing.
Underbar/Overbar symbols may not be to scale.
** Pin 1 identifier for 2x2 Thin MLF® is “▲” symbol.
*
M9999-062507
June 2007
2
Micrel, Inc.
MIC5305
Pin Configuration
6
5
4
BYP
NC
6
5
4
BYP
EN
GND
VIN
1
2
3
EN
GND
VIN
1
2
3
ADJ
VOUT
VOUT
MIC5305-x.xBML/YML (Fixed)
6-Pin 2mm x 2mm MLF® (ML)
(Top View)
MIC5305-x.xBML/YML (Adjustable)
6-Pin 2mm x 2mm MLF® (ML)
(Top View)
EN GND VIN
6
5
4
BYP
NC
3
2
1
EN
GND
VIN
1
2
3
KWxx
4
5
VOUT
BYP
VOUT
MIC5305-x.xYMT (Fixed)
6-Pin 2mm x 2mm Thin MLF® (MT)
(Top View)
MIC5305-x.xBD5/YD5 (Fixed)
TSOT-23-5 (D5)
(Top View)
Pin Description
Pin Number
MLF-6
Pin Number
MLF-6
Adjustable
Pin Number
Thin MLF-6
Fixed
Pin Number
TSOT23-5
Fixed
Pin Name
Pin Name
Fixed
1
1
1
3
EN
Enable Input. Active High. High = on, low = off. Do not leave
floating.
2
3
4
–
2
3
4
5
2
3
4
–
2
1
5
GND
VIN
Ground.
Supply Input.
Output Voltage.
VOUT
ADJ
Adjust Input: Connect to external resistor voltage divider
network.
5
6
–
6
5
6
–
4
NC
No connection for fixed voltage parts.
BYP
Reference Bypass: Connect external 0.1µF to GND for reduced
output noise. May be left open.
HS Pad
HS Pad
HS Pad
–
EPAD
Exposed Heatsink Pad connected to ground internally.
M9999-062507
June 2007
3
Micrel, Inc.
MIC5305
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)............................................... 0V to 6V
Enable Input Voltage (VEN)..................................... 0V to 6V
Power Dissipation (PD)...........................Internally Limited(3)
Junction Temperature (TJ) ........................–40°C to +125°C
Lead Temperature (soldering, 5sec.)......................... 260°C
Storage Temperature (Ts) .........................–65°C to +150°C
EDS Rating(4)..................................................................2kV
Supply voltage (VIN) ....................................... 2.25V to 5.5V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature (TJ) ........................–40°C to +125°C
Junction Thermal Resistance
MLF-6 (θJA)........................................................93°C/W
Thin MLF-6 (θJA)................................................93°C/W
TSOT-23-5 (θJA) ..............................................235°C/W
Electrical Characteristics(5)
VIN = VOUT + 1.0V; COUT = 1.0µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy Variation from nominal VOUT
Variation from nominal VOUT, IOUT = 100mA to 150mA
Condition
Min
–1.0
–2.0
Typ
Max
+1.0
+2.0
Units
%
%
Output Voltage Temp.
40
pm/°C
Coefficient
Line Regulation
VIN = VOUT +1V to 5.5V
IOUT = 100µA to 150mA
IOUT = 50mA, VOUT > 2.8V
IOUT = 150mA, VOUT > 2.8V
IOUT = 50mA, VOUT > 2.8V
IOUT = 150mA, VOUT > 2.8V
IOUT = 0 to 150mA
0.02
0.1
20
0.3
0.5
35
%/V
%
Load Regulation(6)
Dropout Voltage(7)
mV
mV
mV
mV
µA
60
85
27
45
85
110
150
Ground Pin Current(8)
90
Ground Pin Current in
Shutdown
VEN ≤ 0.2V
0.5
µA
Ripple Rejection
f = up to 1kHz; COUT = 1.0µF ceramic; CBYP = 0.1µF
f = 10kHz; COUT = 1.0µF ceramic; CBYP = 0.1µF
VOUT = 0V
85
65
dB
dB
Current Limit
300
1.0
600
20
900
100
0.2
mA
Output Voltage Noise
Turn-On Time
COUT =1µF, CBYP = 0.1µF, 10Hz to 100kHz
COUT = 1µF; CBYP= 0.1µF; IOUT= 150mA
µVrms
µs
30
Enable Input
Enable Input Voltage
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
VIL ≤ 0.2V (Regulator Shutdown)
VIH ≥ 1.0V (Regulator Enabled)
V
V
Enable Input Current
0.01
0.01
1
1
µA
µA
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 TA (ambient temperature) is PD(max) = (TJ(max) - TA) / θJA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model.
5. Specification for packaged product only.
6. Regulation is measured at constant junction temperature using low duty cycle pulse testing, 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 VOUT. For outputs below 2.25V,
dropout voltage is the input-to-output differential with the minimum input voltage 2.25V.
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.
M9999-062507
June 2007
4
Micrel, Inc.
MIC5305
Typical Characteristics
PSRR
PSRR
PSRR
(Bypass Pin Cap = 0.01µF)
(Bypass Pin Cap = 0.1µF)
(Bypass Pin Cap = 1µF)
120
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
50mA
150mA
150mA
100
150mA
100µA
80
60
40
20
0
50mA
50mA
100µA
100µA
0.1
1
10
100
0.1
1
10
100
1k
1000
6
0.1
1
10
100
1k
1k
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
Ground Pin Current
Ground Pin Current
Ground Pin Current
94
92
90
88
86
84
82
80
78
76
74
72
70
94
92
90
88
86
84
82
80
78
76
74
72
70
90
85
80
75
70
I
= 150mA
V
= VOUT +1V
100
I
= 100µA
LOAD
20 40 60 80 100 120
TEMPERATURE (°C)
IN
LOAD
20 40 60 80 100 120
TEMPERATURE (°C)
-40 -20
0
0.1
1
10
-40 -20 0
OUTPUT CURRENT (mA)
Ground Pin Current
Ground Pin Current
Dropout Characteristics
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
3.5
3
I
= 100µA
LOAD
2.5
2
I
= 150mA
1.5
1
LOAD
0.5
0
I
= 100µA
I
= 150mA
LOAD
3
LOAD
0
1
2
4
5
0
1
2
3
4
5
6
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Dropout Voltage
Dropout Voltage
Dropout Voltage
2
1.8
1.6
1.4
1.2
1
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
0.8
0.6
0.4
0.2
0
I
= 1mA
I
= 50mA
I
= 100mA
OUT
20 40 60 80 100 120
TEMPERATURE(°C)
OUT
20 40 60 80 100 120
OUT
20 40 60 80 100 120
TEMPERATURE (°C)
-40 -20
0
-40 -20
0
-40 -20 0
TEMPERATURE (°C)
M9999-062507
June 2007
5
Micrel, Inc.
MIC5305
Dropout Voltage
Dropout Voltage
Short Circuit Current
100
90
80
70
60
50
40
30
20
10
70
60
50
40
30
20
10
0
800
700
600
500
400
300
200
100
0
I
= 150mA
OUT
20 40 60 80 100 120
0
-40 -20
0
0
20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
3
3.5
4
4.5
5
5.5
6
TEMPERATURE (°C)
INPUT VOLTAGE (V)
Output Voltage
vs. Temperature
Enable Threshold
vs. Temperature
Output Noise Spectral Density
2.92
2.91
2.9
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
2.89
2.88
2.87
2.86
ILOAD = 100µA
OUT = 2.9V
I
= 100µA
V
LOAD
2.85
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
TEMPERATURE (°C)
M9999-062507
June 2007
6
Micrel, Inc.
MIC5305
Functional Characteristics
Line Transient Response
Load Transient Response
5V
3V
CBYP = 0.01µF
IN = 4V
OUT = 1µF Ceramic
V
C
CBYP = 0.01µF
I
OUT = 100µA
COUT = 1µF Ceramic
TIME (400µs/div)
TIME (4µs/div)
Enable Pin Delay
Shutdown Delay
CBYP = 0.01µF
I
OUT = 100µA
VIN = 4V
CIN = 1µF Ceramic
COUT = 1µF Ceramic
CBYP = 0.01µF
IOUT = 100µA
CIN = 1µF Ceramic
COUT = 1µF Ceramic
TIME (10µs/div)
TIME (20µs/div)
M9999-062507
June 2007
7
Micrel, Inc.
MIC5305
Functional Diagram
VIN
EN
VOUT
Quick-
Start
VREF
Error
Amp
BYP
Thermal
Shutdown
Current
Limit
GND
MIC5305 Block Diagram – Fixed
VIN
EN
VOUT
Quick-
Start
VREF
Error
Amp
BYP
Thermal
Shutdown
Current
Limit
GND
MIC5305 Block Diagram – Adjustable
M9999-062507
June 2007
8
Micrel, Inc.
MIC5305
No-Load Stability
Application Information
Unlike many other voltage regulators, the MIC5305 will
remain stable and in regulation with no load. This is
especially import in CMOS RAM keep-alive applications.
Enable/Shutdown
The MIC5305 comes with an active-high enable pin that
allows the regulator to be disabled. Forcing the enable
pin low disables the regulator and sends it into a “zero”
off-mode-current state. In this state, current consumed
by the regulator goes nearly to zero. Forcing the enable
pin high enables the output voltage. The active-high
enable pin uses CMOS technology and the enable pin
cannot be left floating; a floating enable pin may cause
an indeterminate state on the output.
Adjustable Regulator Application
Adjustable regulators use the ratio of two resistors to
multiply the reference voltage to produce the desired
output voltage. The MIC5305 can be adjusted from
1.25V to 5.5V by using two external resistors (Figure 1).
The resistors set the output voltage based on the
following equation:
R1
R2
⎛
⎞
⎟
VOUT = VREF 1+
⎜
Input Capacitor
⎝
⎠
The MIC5305 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 1µF capacitor is
required from the input to ground to provide stability.
Low-ESR ceramic capacitors provide optimal perform-
ance at a minimum of space. Additional high frequency
capacitors, such as small-valued NPO dielectric-type
capacitors, help filter out high-frequency noise and are
good practice in any RF-based circuit.
VREF = 1.25V
MIC5305BML
VIN
VOUT
VIN VOUT
R1
R2
1µF
1µF
EN
ADJ
GND
Output Capacitor
The MIC5305 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High ESR
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1µF ceramic output capacitor and
does not improve significantly with larger capacitance.
Figure 1. Adjustable Voltage Application
Thermal Considerations
The MIC5305 is designed to provide 150mA of conti-
nuous current in a very small package. Maximum
ambient operating temperature can be calculated based
on the output current and the voltage drop across the
part. Given that the input voltage is 5.0V, the output
voltage is 2.9V and the output current = 150mA.
X7R/X5R dielectric-type ceramic capacitors are recom-
mended because of their temperature performance.
X7R-type capacitors change capacitance by 15% over
their operating temperature range and are the most
stable type of ceramic capacitors. Z5U and Y5V
dielectric capacitors change value by as much as 50%
and 60%, respectively, over their operating temperature
ranges. To use a ceramic chip capacitor with Y5V
dielectric, the value must be much higher than an X7R
ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
The actual power dissipation of the regulator circuit can
be determined using the equation:
PD = (VIN – VOUT) IOUT + VIN IGND
Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
PD = (5.0V – 2.9V) × 150mA PD = 0.32W
To determine the maximum ambient operating temp-
erature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
Bypass Capacitor
A capacitor can be placed from the noise bypass pin to
ground to reduce output voltage noise. The capacitor
bypasses the internal reference. A 0.1µF capacitor is
recommended for applications that require low-noise
outputs. The bypass capacitor can be increased, further
reducing noise and improving PSRR. Turn-on time
increases slightly with respect to bypass capacitance. A
unique, quick-start circuit allows the MIC5305 to drive a
large capacitor on the bypass pin without significantly
slowing turn-on time. Refer to the Typical Characteristics
section for performance with different bypass capacitors.
T
− TA
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
J(max)
PD(max)
=
θJA
TJ(max) = 125°C, the max. junction temperature of
the die.
θJA thermal resistance = 93°C/W
M9999-062507
June 2007
9
Micrel, Inc.
MIC5305
Table 1 shows junction-to-ambient thermal resistance for
the MIC5305 in the 6-pin 2mm × 2mm MLF® package.
minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
125°C − TA
0.32W =
Package
θ
JA Recommended
Minimum Footprint
θ
JC
93°C/W
6-Pin 2x2 MLF®
93°C/W
2°C/W
TA = 95.2°C
Therefore, a 2.9V application at 150mA of output current
can accept an ambient operating temperature of 95.2°C
in a 6-pin 2mm x 2mm MLF® package. For a full dis-
cussion of heat sinking and thermal effects on voltage
regulators, refer to the “Regulator Thermals” section of
Micrel’s Designing with Low-Dropout Voltage Regulators
handbook. This information can be found on Micrel's
website at:
Table 1. Thermal Resistance
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-to-
ambient thermal resistance for the minimum footprint
(the minimum amount of copper that you can solder the
part to) is 93°C/W, from Table 1. The maximum power
dissipation must not be exceeded for proper operation.
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
For example, when operating the MIC5305-2.9BML at
an input voltage of 5.0V and 150mA load with a
M9999-062507
June 2007
10
Micrel, Inc.
MIC5305
Package Information
6-Pin 2x2 MLF® (ML)
6-Pin 2x2 Thin MLF® (MT)
M9999-062507
June 2007
11
Micrel, Inc.
MIC5305
5-Pin TSOT-23 (D5)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2004 Micrel, Incorporated.
M9999-062507
June 2007
12
相关型号：
MIC5305-4.75YMLTR
4.75V FIXED POSITIVE LDO REGULATOR, 0.085V DROPOUT, PDSO6, 2 X 2 MM, LEAD FREE, MLF-6
MICROCHIP
©2020 ICPDF网 联系我们和版权申明