MIC5202 - Micrel

MIC5202
Dual, 100mA Low-Dropout Regulator
General Description
Features
The MIC5202 is a dual linear voltage regulator with low
dropout voltage (typically 17mV at light loads and 210mV
at 100mA), and low ground current (1mA at 100mA per
output). Ideal for battery-operated applications, the
MIC5202 offers 1% output voltage accuracy and dual
enable pins. The enable pins may be driven individually or
tied directly to VIN. When the part is disabled, power
consumption drops to nearly zero. The MIC5202 ground
current increases slightly in dropout, which minimizes
power consumption and increases battery life. Some key
features include reversed battery protection, current limit,
and overtemperature protection.
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The MIC5202 is available in fixed output voltages in the
small 8-pin SOIC package.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
High output voltage accuracy
Variety of output voltages
Up to 100mA of continuous output current
Low ground current
Low dropout voltage
Excellent line and load regulations
Extremely low temperature coefficient
Current and thermal limit protections
Reverse-battery protection
Zero-off mode current
Logic-controlled electronic shutdown
8-Pin SOIC package
Applications
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Cell phones
Laptop, notebook, and palmtop computers
Battery-powered equipment
PCMCIA VCC and VPP regulation/switching
Bar code scanners
SMPS post-regulator/ DC to DC modules
High-efficiency linear power supplies
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 10, 2013
Revision 2.0
Micrel, Inc.
MIC5202
Ordering Information
(1)
Part Number
Marking
VOUT1
VOUT2
Accuracy
Junction Temperature. Range
Package
MIC5202-3.0YM
30YM
3V
3V
1%
–40°C to +125°C
8-Pin SOIC
MIC5202-3.3YM
33YM
3.3V
3.3V
1%
–40°C to +125°C
8-Pin SOIC
MIC5202-4.8YM
48YM
4.85V
4.85V
1%
–40°C to +125°C
8-Pin SOIC
MIC5202-5.0YM
50YM
5V
5V
1%
–40°C to +125°C
8-Pin SOIC
Note:
1. Other voltages are available. Contact Micrel for details.
Pin Configuration
8-Pin SOIC (M)
(Top View)
Pin Description
Pin Number
Pin Name
1
VOUT1
Output of regulator 1.
2
GND1
Ground pin of LDO1.
3
VOUT2
Output of regulator 2.
4
GND2
Ground pin of LDO2.
5
EN2
Enable input for LDO2. Active-high Input. Logic high = On, logic low = Off. Do not leave floating.
6
VIN2
Voltage input for LDO2.
7
EN1
Enable input for LDO1. Active-high Input. Logic high = On, logic low = Off. Do not leave floating.
8
VIN1
Voltage input for LDO1.
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Pin Function
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MIC5202
Absolute Maximum Ratings(2)
Operating Ratings(3)
Input Supply Voltage (VIN1, VIN2)................. –20V to +60V
Enable Input Voltage (EN1, EN2) .................. –20V to +60V
Lead Temperature (soldering, 10s) ............................ 260°C
Storage Temperature (Ts)......................... –65°C to +150°C
(4)
ESD Rating ................................................. ESD Sensitive
Input Supply Voltage (VIN1, VIN2) ............... +2.5V to +26V
Enable Input Voltage (EN1, EN2) .......................... 0V to VIN
Junction Temperature (TJ) .......................... –40°C to 125°C
Junction Thermal Resistance
SOIC (θJA) .......................................................... 63°C/W
Electrical Characteristics(5)
VIN = VOUT + 1V; COUT = 10µF; IOUT = 1mA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted.
Specifications are for one LDO.
Symbol
Parameter
VOUT
Output Voltage Accuracy
ΔVOUT/ΔT
Output Voltage Temperature
(6)
Coefficient
ΔVOUT/VOUT
Line Regulation
ΔVOUT/VOUT
Load Regulation
VIN – VOUT
ISHUTDOWN
IGND
Dropout Voltage
Condition
(7)
(8)
Ground Pin Current in
Shutdown
Ground Pin Current
(9)
Min.
Typ.
Max.
Units
1
2
%
40
150
ppm/°C
VIN = VOUT + 1V to 26V
0.004
0.10
0.40
%
IOUT = 0.1mA to 100mA
0.04
0.16
0.30
%
IOUT = 100µA
IOUT = 20mA
IOUT = 30mA
IOUT = 50mA
IOUT = 100mA
17
130
150
180
225
VEN ≤ 0.7V (shutdown)
0.01
µA
VEN ≥ 2.0V, IOUT = 100µA
IOUT = 20mA
IOUT = 30mA
IOUT = 50mA
IOUT = 100mA I
170
270
330
500
1200
µA
–1
–2
mV
350
1500
Notes:
2. Exceeding the absolute maximum ratings may damage the device.
3. The device is not guaranteed to function outside its operating ratings.
4. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
5. Specification for packaged product only.
6. Output voltage temperature coefficient is defined as the worst case voltage change divided by the temperature range.
7. Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load
range from 0.1mA to 100mA. Changes in output voltage caused by heating effects are covered by the thermal regulation specification.
8. 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.
9. 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.
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MIC5202
Electrical Characteristics(5) (Continued)
VIN = VOUT + 1V; COUT = 10µF; IOUT = 1mA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted.
Specifications are for one LDO.
Symbol
Parameter
Condition
Min.
IGNDDO
Ground Pin Current in Dropout
VIN = 0.5V less than VOUT, IOUT = 100µA
PSRR
Power Supply Rejection Ratio
ILIMIT
Short Circuit Current Limit
VOUT = 0V
Typ.
Max.
Units
270
330
µA
75
dB
280
mA
ΔVOUT/ΔPD
Thermal Regulation
0.05
%/W
en
Output Noise
100
µV
(10)
Enable Input
VEN
Enable Input Voltage
Logic low = Off
Logic high = On
IENL
IENH
Enable Input Current
VEN ≤ 0.7V
VEN ≥ 2.0V
0.7
V
2.0
0.01
8
50
µA
Note:
10. 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 100mA load pulse at VIN = 26V for t = 10ms.
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MIC5202
Typical Characteristics
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MIC5202
Typical Characteristics (Continued)
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MIC5202
Typical Characteristics (Continued)
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MIC5202
30°C, so tantalum capacitors are recommended for
operations below –25°C. An equivalent series resistance
(ESR) of 5Ω or less with a resonance frequency above
500 kHz is recommended. The output capacitor value
may be increased without limit.
Application Information
The MIC5202 is a dual linear voltage regulator with low
dropout voltage and low ground current features. Ideal for
battery operated applications, the MIC5202 offers 1%
output voltage accuracy, two independent enable pins,
reversed battery protection, short circuit current limit and
overtemperature protection. When the MIC5202 is
disabled, the ground pin current drops to sub-micro amp
and prolongs the battery life.
At lower output loads, a smaller output capacitor value is
required for output stability. The capacitor can be
reduced to 0.47µF for current below 10mA or 0.33µF for
current below 1mA.
No-Load Stability
Unlike many other voltage regulators, the MIC5202
remains stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Input Supply Voltage
VIN1 and VIN2 provide power to each internal circuit and
may be tied together.
Ground
Both ground pins (pin 2 and 4) must be tied to the same
ground potential when using a single power supply.
Enable Input
The MIC5202 features dual active-high enable pins that
allow each regulator to be enabled and disabled
independently. Forcing the enable pin low disables the
regulator and sends it to 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 typically
consumes 8µA of current and cannot be left floating; a
floating enable pin may cause an indeterminate state on
the output.
Input Capacitor
A 1µF tantalum or aluminum electrolytic capacitor should
be placed close to each VIN pin if there is more than 10
inches of copper between the input and the capacitor, or
if a battery is used as the supply.
Output Capacitor
The MIC5202 requires an output capacitor of 1µF or
greater to maintain stability. Increasing the output
capacitor leads to an improved transient response;
however, the size and cost also increase. Most tantalum
and aluminum electrolytic capacitors are adequate; film
capacitors will work as well, but at a higher cost. Many
aluminum electrolytics have electrolytes that freeze at –
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Thermal Shutdown
When the internal die temperature of MIC5202 reaches
the limit, the internal driver is disabled until the die
temperature falls.
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MIC5202
Part II. Nominal Power Dissipation and Die
Temperature
At 25°C ambient temperature, the MIC5202 operates
reliably at up to 625mW when mounted in the “worst case”
manner described in Part I. Layout. At an ambient
temperature of 55°C, the device can safely dissipate
440mW. These power levels are equivalent to a die
temperature of 125°C, which corresponds to the
recommended maximum temperature for non­military
grade silicon integrated circuits.
Thermal Considerations
Part I. Layout
The MIC5202 (8-pin SOIC package) has the thermal
characteristics shown in Table 1, when mounted on a
single-layer copper-clad printed circuit board.
Table 1. Thermal Characteristic Consideration
PC Board Dielectric
θJA
FR4
160°C/W
Ceramic
120°C/W
Multi-layer boards with a dedicated ground plane, wide
traces, and large supply bus lines provide better thermal
conductivity.
The “worst case” value of 160°C/W assumes no ground
plane, minimum trace widths, and a FR4 material board.
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MIC5202
Package Information(11) and Recommended Landing Pattern
8-Pin SOIC Package (M)
Note:
11. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
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
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
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
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© 2013 Micrel, Incorporated.
May 10, 2013
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