MIC5205-2.85BM5 Micrel Inc, MIC5205-2.85BM5 Datasheet

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MIC5205-2.85BM5

Manufacturer Part Number
MIC5205-2.85BM5
Description
Manufacturer
Micrel Inc
Datasheet

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MIC5205
General Description
The MIC5205 is an efficient linear voltage regulator with ultra-
low-noise output, very low dropout voltage (typically 17mV at
light loads and 165mV at 150mA), and very low ground
current (600 A at 100mA output). The MIC5205 offers better
than 1% initial accuracy.
Designed especially for hand-held, battery-powered devices,
the MIC5205 includes a CMOS or TTL compatible enable/
shutdown control input. When shutdown, power consump-
tion drops nearly to zero. Regulator ground current increases
only slightly in dropout, further prolonging battery life.
Key MIC5205 features include a reference bypass pin to
improve its already excellent low-noise performance, re-
versed-battery protection,
overtemperature shutdown.
The MIC5205 is available in fixed and adjustable output
voltage versions in a small SOT-23-5 package.
For low-dropout regulators that are stable with ceramic
output capacitors, see the Cap MIC5245/6/7 family.
Typical Application
June 2000
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Ordering Information
Other voltages available. Contact Micrel for details.
Part Number
MIC5205BM5
MIC5205-2.5BM5
MIC5205-2.7BM5
MIC5205-2.8BM5
MIC5205-2.85BM5
MIC5205-2.9BM5
MIC5205-3.0BM5
MIC5205-3.3BM5
MIC5205-3.6BM5
MIC5205-3.8BM5
MIC5205-4.0BM5
MIC5205-5.0BM5
EN (pin 3) may be
connected directly
to IN (pin 1).
Shutdown
Enable
current
V
EN
IN
Ultra-Low-Noise Regulator Application
MIC5205-x.xBM5
1
2
3
limiting,
Marking
LBAA
LB25
LB27
LB28
LB2J
LB29
LB30
LB33
LB36
LB38
LB40
LB50
5
4
and
C
BYP
Voltage
V
2.85V
2.5V
2.7V
2.8V
2.9V
3.0V
3.3V
3.6V
3.8V
4.0V
5.0V
C
tantalum
Adj
OUT
1
OUT
Features
• Ultra-low-noise output
• High output voltage accuracy
• Guaranteed 150mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Reverse-battery protection
• “Zero” off-mode current
• Logic-controlled electronic enable
Applications
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• PCMCIA V
• Consumer/personal electronics
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
= 2.2µF
Accuracy
Low-Noise Operation:
C
Basic Operation:
C
BYP
BYP
150mA Low-Noise LDO Regulator
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
= 470pF, C
= not used, C
CC
and V
Junction Temp. Range*
OUT
MIC5205
OUT
–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
PP
2.2µF
regulation/switching
1µF
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
SOT-23-5
SOT-23-5
Package
MIC5205
Micrel

Related parts for MIC5205-2.85BM5

MIC5205-2.85BM5 Summary of contents

Page 1

... SOT-23-5 package. For low-dropout regulators that are stable with ceramic output capacitors, see the Cap MIC5245/6/7 family. Ordering Information Part Number MIC5205BM5 MIC5205-2.5BM5 MIC5205-2.7BM5 MIC5205-2.8BM5 MIC5205-2.85BM5 MIC5205-2.9BM5 MIC5205-3.0BM5 MIC5205-3.3BM5 MIC5205-3.6BM5 MIC5205-3.8BM5 MIC5205-4.0BM5 MIC5205-5.0BM5 Other voltages available. Contact Micrel for details. ...

Page 2

... EN GND LBxx LBAA BYP OUT ADJ MIC5205-x.xBM5 MIC5205BM5 Fixed Voltages Adjustable Voltage Pin Function IN Supply Input GND Ground EN Enable/Shutdown (Input): CMOS compatible input. Logic high = enable, logic low or open = shutdown. BYP Reference Bypass: Connect external 470pF capacitor to GND to reduce output noise. May be left open. ...

Page 3

... Exceeding the maximum J(max the MIC5205- JA Micrel Units % % ppm %/W nV MIC5205 ...

Page 4

... Power Supply Rejection Ratio -20 OUT -40 - 100mA -80 OUT OUT -100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) MIC5205 Power Supply Rejection Ratio -20 OUT -40 - 100 A OUT - 2.2 F OUT C = 0.01 F BYP -100 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 ...

Page 5

... BYP 0.0001 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E 10k 100k 1M 10M 100 FREQUENCY (Hz) Noise Performance 10 1 100mA 0.1 1mA 0. OUT 10mA OUT 0.001 electrolytic C = 10nF BYP 0.0001 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) MIC5205 ...

Page 6

... C BYP (optional MIC5205 IN BYP Bandgap Ref. V REF EN Current Limit Thermal Shutdown MIC5205-x.xBM5 Ultra-Low-Noise Fixed Regulator IN Bandgap Ref. V REF EN Current Limit Thermal Shutdown MIC5205BM5 GND Ultra-Low-Noise Adjustable Regulator 6 OUT V OUT C OUT GND OUT V OUT C OUT R1 ADJ R2 C BYP (optional R2/R1) OUT REF ...

Page 7

... The capacitor can be reduced to 0.47 F for current below 10mA or 0.33 F for currents below 1mA. No-Load Stability The MIC5205 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. ...

Page 8

... Figure example of a low-noise configuration where C is not required minimum. BYP OUT Adjustable Regulator Applications The MIC5205BM5 can be adjusted to a specific output voltage by using two external resistors (Figure 3). The resis- tors set the output voltage based on the following equation: MIC5205 V OUT V ...

Page 9

... REF 3.02 (0.119) 2.80 (0.110) 0.50 (0.020) 0.35 (0.014) June 2000 1.75 (0.069) 3.00 (0.118) 1.50 (0.059) 2.60 (0.102) DIMENSIONS: MM (INCH) 1.30 (0.051) 0.90 (0.035 0.15 (0.006) 0.60 (0.024) 0.00 (0.000) 0.10 (0.004) SOT-23-5 (M5) 9 Micrel 0.20 (0.008) 0.09 (0.004) MIC5205 ...

Page 10

... MIC5205 MIC5205 10 Micrel June 2000 ...

Page 11

... MIC5205 June 2000 11 Micrel MIC5205 ...

Page 12

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC5205 + 1 (408) 944-0970 http://www ...

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