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MIC5247-1.8YM5-TR

P1-P3P4-P6P7-P9P10-P11
MIC5247 Micrel, Inc.
February 2006 1 M9999-022406
General Description
The MIC5247 is an efficient and precise, low-voltage CMOS
voltage regulator optimized for ultra-low noise applications.
The MIC5247 offers better than 1% initial accuracy and
85µA constant ground current over load (typically 85µA).
The MIC5247 provides a very low-noise output, ideal for
RF applications where quiet voltage sources are required.
A noise bypass pin is also available for further reduction of
output noise.
Designed specifically for handheld and battery-powered de
-
vices, the MIC5247 provides a logic compatible enable pin.
When disabled, power consumption drops nearly to zero.
The MIC5247 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in handheld wireless devices.
Key features include current limit, thermal shutdown, a push-
pull output for faster transient response, and an active clamp
to speed up device turnoff. Available in the 6-pin 2mm × 2mm
MLF™ package and the IttyBitty
®
SOT-23-5 package, the
MIC5247 also offers a range of fixed output voltages.
All support documentation can be found on Micrel’s web site
at www.micrel.com.
Typical Application
1 5
2
3
4
C
OUT
C
BYP
Enable
Shutdown
EN
V
OUT
(optional)
MIC5247-x.xBM5
EN (pin 3) may be
connected directly
to IN (pin 1).
V
IN
MIC5247
150mA Low-Voltage µCap Linear Regulator
Features
• Ultra-low noise
• Low-voltage outputs
• Load independent, ultra-low ground current: 85µA
• 150mA output current
• Current limiting
• Thermal shutdown
• Tight load and line regulation
• “Zero” off-mode current
• Stability with low-ESR capacitors
• Fast transient response
• Logic-controlled enable input
Applications
• Cellular phones and pagers
• Cellular accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• PCMCIA V
CC
and V
PP
regulation/switching
• Consumer/personal electronics
• SMPS post-regulator/DC-to-DC modules
• High-efficiency linear power supplies
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
MIC5247-x.xBML
1
EN
6
C
BYP
(optional)
V
IN
V
OUT
C
OUT
5
4
2
3
ENABLE
SHUTDOWN
Ultra-Low-Noise Regulator Application
MIC5247 Micrel, Inc.
M9999-022406 2 February 2006
Pin Configuration
IN
OUTBYP
EN
LUxx/
NUxx
13
4 5
2
GND
MIC5247-x.xBM5 / YM5
MIC5247-x.xBD5 / YM5
(Top View)
1EN
GND
IN
6 BYP
NC
OUT
5
4
2
3
MIC5247-x.xBML / YML
6-Pin 2mm × 2mm MLF™ (ML)
(Top View)
Ordering Information
Part Number
Voltage*
Junction
Temp. Range
Package
Standard Marking Pb-Free Marking**
MIC5247-1.5BM5 LU15 MIC5247-1.5YM5 LU15 1.5V –40ºC to +125ºC SOT-23-5
MIC5247-1.6BM5 LU16 MIC5247-1.6YM5 LU16 1.6V –40ºC to +125ºC SOT-23-5
MIC5247-1.8BM5 LU18 MIC5247-1.8YM5 LU18 1.8V –40ºC to +125ºC SOT-23-5
MIC5247-1.85BM5 LU1J MIC5247-1.85YM5 LU1J 1.85V –40ºC to +125ºC SOT-23-5
MIC5247-2.0BM5 LU20 MIC5247-2.0YM5 LU20 2.0V –40ºC to +125ºC SOT-23-5
MIC5247-2.1BM5 LU21 MIC5247-2.1YM5 LU21 2.1V –40ºC to +125ºC SOT-23-5
MIC5247-2.2BM5 LU22 MIC5247-2.2YM5 LU22 2.2V –40ºC to +125ºC SOT-23-5
MIC5247-2.4BM5 LU24 MIC5247-2.4YM5 LU24 2.4V –40ºC to +125ºC SOT-23-5
MIC5247-1.8BD5 NU18 MIC5247-1.8YD5 NU18 1.8V –40ºC to +125ºC Thin SOT-23-5
MIC5247-2.0BD5 NU20 MIC5247-2.0YD5 NU20 2.0V –40ºC to +125ºC Thin SOT-23-5
MIC5247-1.5BML U15 MIC5247-1.5YML U15 1.5V –40ºC to +125ºC 6-Pin 2mm x 2mm MLF™
MIC5247-1.6BML U16 MIC5247-1.6YML U16 1.6V –40ºC to +125ºC 6-Pin 2mm x 2mm MLF™
MIC5247-1.8BML U18 MIC5247-1.8YML U18 1.8V –40ºC to +125ºC 6-Pin 2mm x 2mm MLF™
MIC5247-1.85BML U1J MIC5247-1.85YML U1J 1.85V –40ºC to +125ºC 6-Pin 2mm x 2mm MLF™
* Other voltage options available, please contact Micrel Marketing for details.
** Over and under bar ( ) (__) symbols may not be to scale.
Pin Description
Pin Number Pin Number Pin Name Pin Function
SOT-23-5 MLF™-6
1 3 IN
Supply input.
2 2 GND Ground.
3 1 EN Enable/Shutdown (Input): CMOS-compatible input. Logic high = enable;
logic low = shutdown. Do not leave open.
4 6 BYP Reference bypass: Connect external 0.01pF capacitor to GND to reduce
output noise. May be left open.
5 4 OUT Regulator output.
— 5 NC No internal connection.
— EP GND Ground. Internally connected to the exposed pad. Connect to ground pin.
MIC5247 Micrel, Inc.
February 2006 3 M9999-022406
Electrical Characteristics
(4)
V
IN
= V
OUT
+ 1.0V; V
IN
= V
EN
; I
OUT
= 100µA; T
J
= 25°C, bold values indicate –40°C ≤ T
J
≤ +125°C; unless noted.
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage Accuracy I
OUT
= 0mA –1 1 %
–2 2 %
ΔV
LNR
Line Regulation V
IN
= 2.7V to 6V –0.3 +0.3 %/V
ΔV
LDR
Load Regulation I
OUT
= 0.1mA to 150mA
(5)
2 3 %
Load Regulation for 1.5V and 1.6V I
OUT
= 0.1mA to 150mA, V
OUT
= 1.5V or 1.6V 3 4 %
V
IN
– V
OUT
Dropout Voltage I
OUT
= 150mA
(6)
150 mV
I
Q
Quiescent Current V
EN
≤ 0.4V (shutdown) 0.2 1 µA
I
GND
Ground Pin Current
(7)
I
OUT
= 0mA 85 150 µA
I
OUT
= 150mA 85 150 µA
PSRR Power Supply Rejection f ≤ 1kHz 50 dB
I
LIM
Current Limit V
OUT
= 0V 160 300 mA
e
n
Output Voltage Noise C
OUT
= 10µF, C
BYP
= 0.01µF, 30 µVrms
f = 10Hz to 100kHz
Enable Input
V
IL
Enable Input Logic-Low Voltage V
IN
= 2.7V to 5.5V, regulator shutdown 0.8 0.4 V
V
IH
Enable Input Logic-High Voltage V
IN
= 2.7V to 5.5V, regulator enabled 1.6 1 V
I
EN
Enable Input Current V
IL
≤ 0.4V 0.01 µA
V
IH
≥ 1.6V 0.01 µA
Shutdown Resistance Discharge 500 Ω
Thermal Protection
Thermal Shutdown Temperature 150 °C
Thermal Shutdown Hysteresis 10 °C
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
3. Devices are ESD sensitive. Handling precautions recommended.
4. Specification for packaged product only.
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 a1V differential.
For outputs below 2.7V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.7V. Minimum input operating volt-
age is 2.7V.
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.
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) ....................................0V to +7V
Enable Input Voltage (V
EN
) ...................................0V to V
IN
Junction Temperature (T
J
) ....................................... +150°C
Storage Temperature (T
S
) ........................ –65°C to +150°C
Lead Temperature (soldering, 5 sec.) ........................
260°C
ESD Rating
(3)
Operating Ratings
(2)
Input Voltage (V
IN
) .......................................... +2.7V to +6V
Enable Input Voltage (V
EN
) ...................................0V to V
IN
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance
SOT-23-5 (θ
JA
) .................................................. 235°C/W
2mm × 2mm MLF™ (θ
JA
) .................................... 90°C/W
P1-P3P4-P6P7-P9P10-P11

MIC5247-1.8YM5-TR

Mfr. #:
Buy MIC5247-1.8YM5-TR
Manufacturer:
Microchip Technology / Micrel
Description:
LDO Voltage Regulators 150mA Low Voltage uCap CMOS Regulator
Lifecycle:
New from this manufacturer.
Delivery:
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