MIC5203-3.8BM4T&R [MICROCHIP]
Fixed Positive LDO Regulator, 3.8V, 0.6V Dropout, BIPolar, PDSO4, SOT-143, 4 PIN;
| 型号： | MIC5203-3.8BM4T&R |
| 厂家： | 
MICROCHIP |
| 描述： | Fixed Positive LDO Regulator, 3.8V, 0.6V Dropout, BIPolar, PDSO4, SOT-143, 4 PIN 光电二极管 输出元件 调节器 |
| 文件： | 总10页 (文件大小：260K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5203
μCap 80mA Low-Dropout Regulator
General Description
Features
The MIC5203 is a µCap 80mA linear voltage regulator with
very low dropout voltage (typically 20mV at light loads and
300mV at 80mA) and very low ground current (225µA at
20mA output), offering better than 3% initial accuracy with
a logic-compatible enable input.
• Tiny 4- and 5-lead surface-mount packages
• Wide selection of output voltages
• Guaranteed 80mA output
• Low quiescent current
• Low dropout voltage
TheµCap regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The outputs typically
require only 0.47µF of output capacitance for stability.
• Low temperature coefficient
• Current and thermal limiting
• Reversed input polarity protection
• Zero off-mode current
• Logic-controlled shutdown
• Stability with low-ESR ceramic capacitors
Designed especially for hand-held, battery-powered
devices, the MIC5203 can be controlled by a CMOS or
TTL compatible logic signal. When disabled, power
consumption drops nearly to zero. If on-off control is not
required, the enable pin may be tied to the input for 3-
terminal operation. The ground current of the MIC5203
increases only slightly in dropout, further prolonging
battery life. Key MIC5203 features include current limiting,
overtemperature shutdown, and protection against
reversed battery.
Applications
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• Barcode scanners
• SMPS post-regulator/DC-to-DC modules
• High-efficiency linear power supplies
The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,
4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages
are available.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
_________________________________________________________________________________________________________________________
Typical Application
Enable
Shutdown
LAxx
1
2
3
5
4
VOUT
0.47µF
VOUT
0.47µF
Enable
Shutdown
SOT-143 Version
SOT-23-5 Version
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-111909
November 2009
Micrel, Inc.
MIC5203
Ordering Information(1)
Part Number
Marking Pb-Free
Voltage
Temperature Range
Package
Standard
Marking
LA26
LA28
LA30
LA33
LA36
LA38
LA40
LA45
LA47
LA50
LK26
LK28
LK30
LK33
LK36
LK38
LK40
LK45
LK47
LK50
MIC5203-2.6BM4
MIC5203-2.8BM4
MIC5203-3.0BM4
MIC5203-3.3BM4
MIC5203-3.6BM4
MIC5203-3.8BM4
MIC5203-4.0BM4
MIC5203-4.5BM4
MIC5203-4.7BM4
MIC5203-5.0BM4
MIC5203-2.6BM5
MIC5203-2.8BM5
MIC5203-3.0BM5
MIC5203-3.3BM5
MIC5203-3.6BM5
MIC5203-3.8BM5
MIC5203-4.0BM5
MIC5203-4.5BM5
MIC5203-4.7BM5
MIC5203-5.0BM5
LA26
LA28
LA30
LA33
LA36
LA38
LA40
LA45
LA47
LA50
LK26
LK28
LK30
LK33
LK36
LK38
LK40
LK45
LK47
LK50
MIC5203-2.6YM4
MIC5203-2.8YM4
MIC5203-3.0YM4
MIC5203-3.3YM4
MIC5203-3.6YM4
MIC5203-3.8YM4
MIC5203-4.0YM4
MIC5203-4.5YM4
MIC5203-4.7YM4
MIC5203-5.0YM4
MIC5203-2.6YM5
MIC5203-2.8YM5
MIC5203-3.0YM5
MIC5203-3.3YM5
MIC5203-3.6YM5
MIC5203-3.8YM5
MIC5203-4.0YM5
MIC5203-4.5YM5
MIC5203-4.7YM5
MIC5203-5.0YM5
2.6V
2.8V
3.0V
3.3V
3.6V
3.8V
4.0V
4.5V
4.7V
5.0V
2.6V
2.8V
3.0V
3.3V
3.6V
3.8V
4.0V
4.5V
4.7V
5.0V
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Note:
1. Other Voltage available. Contact Micrel for details.
M9999-111909
November 2009
2
Micrel, Inc.
MIC5203
Pin Configuration
EN
2
GND
EN GND IN
1
3
2
1
Part
Identification
LAxx
LKxx
3
4
4
5
IN
OUT
NC
OUT
SOT-143 (M4)
SOT-23-5 (M5)
Pin Description
Pin Number
SOT-143
Pin Number
SOT-23-5
Pin Name
GND
Pin Name
1
2
3
2
Ground.
Enable (Input): TTL/CMOS compatible control input. Logic high =
enabled; logic low or open = shutdown.
3
EN
1
4
5
IN
NC
Supply input.
Not internally connected.
Regulator output.
4
OUT
M9999-111909
November 2009
3
Micrel, Inc.
MIC5203
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)....................................... –20V to +20V
Enable Input Voltage (VEN)............................. –20V to +20V
Power Dissipation (PD)..............................Internally Limited
Storage Temperature (Ts).........................–60°C to +150°C
Lead Temperature (soldering, #sec.)......................... 260°C
Input Voltage (VIN)............................................. 2.5V to 16V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature Range ...................–40°C to +125°C
Thermal Resistance (θJA)...........................................Note 3
Electrical Characteristics
VIN = VOUT + 1V; IL = 1mA; CL = 0.47μF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min
–3
Typ
Max
3
Units
VO
Output voltage accuracy
%
–4
4
Output voltage temperature
coefficient
∆VO/∆T
∆VO/VO
Note 4
50
200
pm/°C
%
0.008
0.3
0.5
0.3
0.5
Line regulation
Load regulation
VIN = VOUT + 1V to 16V
0.08
∆VO/VO
IL = 0.1mA to 80mA(5)
%
IL = 100 μA
20
200
250
300
0.01
180
225
850
1800
200
180
0.05
IL = 20mA
350
∆VO – VO Dropout voltage(6)
mV
μA
μA
IL = 50mA
IL = 80mA
600
IQ
Quiescent current
VEN ≤ 0.4V (shutdown)
IL = 100 μA, VEN ≥ 2.0V (active)
IL = 20mA, VEN ≥ 2.0V (active)
IL = 50mA, VEN ≥ 2.0V (active)
IL = 80mA, VEN ≥ 2.0V (active)
10
750
IGND
Ground pin current(7)
3000
300
IGNDDO
ILIMIT
Ground pin current at dropout
Current limit
V
IN = VOUT(nominal) – 0.5V(7)
μA
mA
VOUT = 0V
Note 8
250
∆VO/∆PD
Thermal regulation
%/W
M9999-111909
November 2009
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Micrel, Inc.
MIC5203
Electrical Characteristics (continued)
VIN = VOUT + 1V; IL = 1mA; CL = 0.47μF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
Enable Input
VIL
Logic low (off)
Logic high (on)
VIL ≤ 0.6V
0.6
Enable input voltage level
V
VIH
IIL
2.0
0.01
15
1
Enable input current
μA
IIH
VIH ≥ 2.0V
50
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 at 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. The θJA is 250°C/W for the SOT-143 and 220°C/W
for the SOT-23-5 mounted on a printed circuit board.
4. Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.
5. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from
0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.
7. Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load
current plus the ground pin current.
8. Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 150mA load pulse at VIN = 16V for t = 10ms.
M9999-111909
November 2009
5
Micrel, Inc.
MIC5203
Typical Characteristics
Dropout Voltage
vs. Output Current
Dropout Voltage
vs. Temperature
Dropout
Characteristics
1000
400
300
200
100
0
4
3
2
1
0
CIN = 10∝F
COUT = 1∝F
CIN = 10∝F
OUT = 1∝F
C
IL = 100∝A
100
10
1
IL = 80mA
IL = 80mA
IL = 100∝A
IL = 1mA
CIN = 10∝F
COUT = 1∝F
0.01
0.1
1
10
100
-60 -30
0
30 60 90 120 150
0
1
2
3
4
5
6
7
OUTPUT CURRENT (mA)
TEMPERATURE°(C)
SUPPLY VOLTAGE (V)
Ground Current
vs. Output Current
Ground Current
vs. Supply Voltage
Ground Current
vs. Temperature
2000
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
0.5
0.0
CIN = 10∝F
OUT = 1∝F
IL = 50mA
C
1500
1000
500
0
IL = 80mA
VOUT = 3.3V
IL = 100∝A
IL = 50mA
IL = 100∝A
VIN = VOUT + 1V
0
10 20 30 40 50 60 70 80
OUTPUT CURRENT (mA)
-60 -30
0
30 60 90 120 150
0
1
2
3
4
5
6
7
TEMPERATURE°(C)
SUPPLY VOLTAGE (V)
Output Voltage
Short Circuit Current
vs. Input Voltage
Thermal Regulation
(3.3V Version)
vs. Output Current
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
160
140
120
100
80
60
40
20
0
-20
-40
1-600
CIN = 10∝F
OUT = 1∝F
C
60
50
0
CIN = 10∝F
40
COUT = 1∝F
20
CL = 1∝F
0
-50
0
50
100
150
200
0
1
2
3
4
5
6
7
-2
0
2
4
6
8
10 12 14 16
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
TIME (ms)
Output Voltage
vs. Temperature
Short Circuit Current
vs. Temperature
Minimum Supply Voltage
vs. Temperature
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
200
180
160
140
120
100
3.5
3.4
3.3
CIN = 10∝F
COUT = 1∝F
IL = 1mA
V
= 3.3V
OUT
CIN = 10∝F
3 DEVICES
COUT = 1∝F
HI / AVG / LO
CIN = 10∝F
OUT = 1∝F
CURVES APPLICABLE
C
AT 100∝A AND 50mA
-60 -30
0
30 60 90 120 150
-60 -30
0
30 60 90 120 150
-60 -30
0
30 60 90 120 150
TEMPERATURE°(C)
TEMPERATURE°(C)
TEMPERATURE°(C)
M9999-111909
November 2009
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Micrel, Inc.
MIC5203
Typical Characteristics (continued)
Load Transient
Line Transient
Load Transient
100
0
3
2
200
CL = 1∝F
IL = 1mA
0
1
COUT = 10∝F
0
COUT = 1∝F
-100
-1200
50
-200
VIN = VOUT + 1
-1
-82
VIN = VOUT + 1
-1400
50
6
4
2
0
0
-50
-50
-5
0
5
10
15
20
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
-1
0
1
2
3
4
5
6
7
8
TIME (ms)
TIME (ms)
Ripple Voltage
vs. Frequency
Ripple Voltage
vs. Frequency
Line Transient
2
1
100
80
60
40
20
0
100
CL = 11∝F
80
60
40
20
0
IL = 1mA
0
-81
6
IL = 100∝A
L = 1∝F
IN = VOUT + 1
IL = 1mA
CL = 1∝F
VIN = VOUT + 1
C
4
V
2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
FREQUENCY (Hz)
FREQUENCY (Hz)
Enable Characteristics
(3.3V Version)
Ripple Voltage
vs. Frequency
Output Impedance
5
4
3
2
1
100
1000
100
10
80
60
40
20
0
IL = 100∝A
IL = 1mA
CL = 1∝F
IL = 100∝A
0
-41
1
IL = 50mA
CL = 1∝F
VIN = VOUT + 1
2
0
IL = 100mA
0.1
0.01
-2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
FREQUENCY (Hz)
FREQUENCY (Hz)
Enable Characteristics
(3.3V Version)
Enable Voltage
vs. Temperature
Enable Current
vs. Temperature
4.0
3.0
2.0
1.0
0.0
-1.40
1.50
1.25
1.00
0.75
0.50
40
CIN = 10∝F
CIN = 10∝F
OUT = 1∝F
L = 1mA
COUT = 1∝F
C
30
20
10
0
IL = 1mA
I
CL = 1∝F
IL = 100∝A
VEN = 5V
VON
VOFF
2
0
VEN = 2V
-2
-2
0
2
4
6
8
10
-60 -30
0
30 60 90 120 150
-60 -30
0
30 60 90 120 150
TIME (∝s)
TEMPERATURE°(C)
TEMPERATURE°(C)
M9999-111909
November 2009
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Micrel, Inc.
MIC5203
Applications Information
No-Load Stability
Input Capacitor
The MIC5203 will remain stable and in regulation with no
load (other than the internal voltage divider) unlike many
other voltage regulators. This is especially important in
CMOS RAM keep-alive applications.
A 0.1µF capacitor should be placed from IN to GND if
there is more than 10 inches of wire between the input
and the AC filter capacitor or when a battery is used as
the input.
Enable Input
Output Capacitor
The MIC5203 features nearly zero off-mode current.
When EN (enable input) is held below 0.6V, all internal
circuitry is powered off. Pulling EN high (over 2.0V) re-
enables the device and allows operation. EN draws a
small amount of current, typically 15µA. While the logic
threshold is TTL/CMOS compatible, EN may be pulled
as high as 20V, independent of VIN.
Typical PNP based regulators require an output
capacitor to prevent oscillation. The MIC5203 is
ultrastable, requiring only 0.47µF of output capacitance
for stability. The regulator is stable with all types of
capacitors, including the tiny, low-ESR ceramic chip
capacitors. The output capacitor value can be increased
without limit to improve transient response.
The capacitor should have a resonant frequency above
500kHz. Ceramic capacitors work, but some dielectrics
have poor temperature coefficients, which will affect the
value of the output capacitor over temperature. Tantalum
capacitors are much more stable over temperature, but
typically are larger and more expensive. Aluminum
electrolytic capacitors will also work, but they have
electrolytes that freeze at about –30°C. Tantalum or
ceramic capacitors are recommended for operation
below –25°C.
M9999-111909
November 2009
8
Micrel, Inc.
MIC5203
Package Information
SOT-143 (M4)
M9999-111909
November 2009
9
Micrel, Inc.
MIC5203
Package Information (continued)
SOT-23-5 (M5)
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.
© 1998 Micrel, Incorporated.
M9999-111909
November 2009
10
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