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PDF MIC5312 Data sheet ( Hoja de datos )
| Número de pieza | MIC5312 | |
| Descripción | LowQ Mode Dual 300mA LDO | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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MIC5312
LowQ™ Mode Dual 300mA LDO
with Integrated POR
General Description
The MIC5312 is a high performance, dual µCap low
dropout regulator with integrated power-on reset
supervisor, offering ultra-low operating current and a
second, even lower operating current mode, LowQ™
mode, reducing operating current by 75%. Each
regulator can source up to 300mA of output current
maximum.
Ideal for battery operated applications, the MIC5312
offers 1% accuracy, extremely low dropout voltage
(60mV @ 150mA), and low ground current (typically
28µA total). When put into LowQ™ mode, the internal
current draw drops down to 7µA total. The MIC5312
also comes equipped with a TTL logic compatible
enable pin that allows the part to be put into a zero-off-
mode current state, drawing no current when disabled.
The Power-on Reset is active low and indicates an
output undervoltage condition on either regulator 1 or 2
when the regulator is enabled.
The MIC5312 is a µCap design, operating with very
small ceramic output capacitors for stability, reducing
required board space and component cost.
The MIC5312 is available in fixed output voltages in the
3mm x 3mm MLF-10 leadless package. Data sheets
and support documentation can be found on Micrel’s
web site at www.micrel.com.
Features
• Input voltage range: 2.5V to 5.5V
• LowQ™ Mode
- 7µA total quiescent current
- 10mA output current capable LowQ™ mode
- Logic level control with external pin
• Stable with ceramic output capacitor
• 2 LDO Outputs – 300mA each
• Integrated Power-on Reset (POR) with adjustable
delay time
• Tiny 3mm x 3mm MLF™-10 package
• Low dropout voltage of 60mV @ 150mA
• Ultra-low quiescent current of 28µA total in Full
Current Mode
• High output accuracy
- ±1.0% initial accuracy
- ±2.0% over temperature
• Thermal Shutdown Protection
• Current Limit Protection
Applications
• Cellular/PCS phones
• Wireless modems
• PDAs
• MP3 Players
Typical Application
VIN
EN1
EN2
LOWQ
BYP
GND
VOUT1
VOUT2
POR
SET
VCORE
VI/O
Baseband
µProcessor
MIC5312-xxBML
MLF and MicroLeadFrame are 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
February 2005
M9999-021105
(408) 955-1690
1 page  
Micrel, Inc.
Typical Characteristics
Ripple Rejection
vs. ILOAD (Normal Mode)
90
80
70
60
50
40
30 VOUT=1.85V
50mA
150mA
20
10
0
VI N=VO U T+1V
COUT=2.2µF
CBYP= 10nF
300mA
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Dropout Characteristics
3
2.5 100mA
2
150mA
300mA
1.5
1
0.5
VOUT=2.6V
00 1 2 3 4 5 6
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage
35
300mA
30
25 100mA
150mA
20
15
10 10mA LowQ™
5
10.3 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
SUPPLY VOLTAGE (V)
Output Noise
Spectral Density
1
0.1
0.01 VIN = 4.45V
COUT = 2.2 µF
CBYP = 0.01µF
VOUT = 1.8V
0.001 ROUT
10 100 1k
10k 100k 1M 10M
FREQUENCY (Hz)
February 2005
Ripple Rejection
LowQ Mode
90
80
70
60
50
40
30 VOUT=1.85V
20
10
0
VI N=VO U T+1V
IL OA D=1 0 m A
COUT= 2.2 µF Ceramic
10 100 1k 10k 100k
FREQUENCY (Hz)
1M
Dropout vs.
Temperature (Normal Mode)
160
140 300mA
120
100
80 150mA
60
40 50mA
20
-040 -20 0 20 40 60 80 100 120
Ground Current
vs. Temperature
35
30 50mA 300mA
25 100mA
150mA
20
15
10
5
-040 -20 0 20 40 60 80 100 120
5
MIC5312
Output Voltage
vs. Temperature
2.7
2.65
2.6
2.55
2.5
2.45
2.4
2.35
2.30100µ2A5 50 75 100
125
Dropout vs.
Temperature (LowQ Mode)
140
120 10mA
100
80 6mA
60
40 3mA
20
-040 -20 0 20 40 60 80 100 120
Ground Current
vs. Temperature (LowQ Mode)
9
8 10mA
7 100µA
6
5
4
3
2
1
-040 -20 0 20 40 60 80 100 120
M9999-021105
(408) 955-1690
5 Page 
Micrel, Inc.
Package Information
MIC5312
10-Pin 3x3 MLF (MLF)
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.
February 2005
11 M9999-021105
(408) 955-1690
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MIC5312.PDF ] | |
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