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PDF MIC49500 Data sheet ( Hoja de datos )
| Número de pieza | MIC49500 | |
| Descripción | High Bandwidth LDO | |
| Fabricantes | Micrel | |
| Logotipo |  |
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MIC49500
5A Dual Supply, Low Voltage,
High Bandwidth LDO
General Description
The MIC49500 is an ultra-high-bandwidth, low-
dropout, 5.0A voltage regulator ideal for powering
core voltages of low-voltage microprocessors. The
MIC49500 implements a dual supply configuration
allowing for very low output impedance and very fast
transient response.
The MIC49500 requires a bias input supply and a
main input supply, allowing for ultra-low input voltages
on the main supply rail. The input supply operates
from 1.4V to 6V and the bias supply requires between
3V and 6V for proper operation. The MIC49500 can
regulate to an output voltage as low as 0.7V, making it
an ideal product for low-voltage to low-voltage
conversion.
The MIC49500 requires a minimum of output
capacitance for stability, working optimally with any
type of capacitor, including small ceramic capacitors.
Available in fixed output voltages from 0.9V to 1.8V
and adjustable output voltages down to 0.7V, the
MIC49500 comes in both 7-pin S-Pak and TO-263
packages. The MIC49500 is rated to the full operating
temperature range of -40°C to 125°C junction
temperature.
Features
• Input voltage range:
– VIN: 1.4V to 6V
– VBIAS: 3.0V to 6V
• Stable with 10µF ceramic output capacitor
• +1.0% initial output tolerance
• Maximum dropout (VIN – VOUT) is 500mV over
temperature
• Adjustable output voltage down to 0.7V
• Ultra Fast Transient Response (Up to 10MHz
bandwidth)
• Excellent line and load regulation specifications
• Logic controlled shutdown option
• Thermal shutdown and current limit protection
• Thin 7-pin S-Pak package
• TO-263 7-pin package
• –40°C to +125°C operating junction temperature
range
Applications
• ASIC Core Voltage Regulator
• PLD/FPGA Core Power Supply
• Linear Point-of-Load Conversion
• High Speed Post-Regulator
Typical Application
VIN = 2.0V
MIC49500WR
IN OUT
VOUT = 1.0V
VBIAS = 3.1V
CBIAS = 1µF
Ceramic
BIAS ADJ
GND
R1
R2
COUT = 10µF
Ceramic
CIN = 1µF
Ceramic
Low Voltage,
Fast Transient Response Regulator
Load Transient
VOUT = 1.8V
VIN = 2.8V
VBIAS = 3.9V
5A COUT = CBIAS = 10µF
0A
Time (10µs/div)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
November 2005
M9999-110805
(408) 955-1690
Free Datasheet http://www.datasheet4u.com/
1 page  
Micrel, Inc.
Typical Characteristics
Ground Current
vs. Load Current
60
55
50
45
40
35 VIN = VOUT + 1V
30
VOUT = 1.2V
VEN = VIN
25 VBIAS = 3.3V
200
0.5
1
1.5
2
COUT = 10µF
2.5 3 3.5 4 4.5
5
LOAD CURRENT (A)
Bias Current
vs. Output Current
80
70
60
50
40
30
20
VIN = VOUT + 1V
VOUT = 1.8V
10 VBIAS = 3.3V
COUT = CBIAS = 10µF
00 1 2 3 4 5
OUTPUT CURRENT (A)
Bias Current
vs. Temperature
60
50
40
0
1A
2.5A
30
100µA
20 500mA
5A
10
VIN = 4V
VOUT = 3V
0
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
VBIAS Dropout Voltage
vs. Output Current
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
VIN = VOUT + 1V
VOUT = 1.5V
0.2
00
1
VBIAS = 3.3V
COUT = 10µF
234
5
OUTPUT CURRENT (A)
November 2005
Output Voltage
vs. Input Voltage
1.6 50mA
1.4
2.5A
1.2
1.0
5A
0.8
0.6
0.4 VOUT = 1.5V
0.2
VBIAS = 3.3V
COUT = 10µF
00 1 2 3 4 5
INPUT VOLTAGE (V)
Ground Current
vs. Temperature
60
2.5A
50
1A
5A
40
30 500mA
0 100µA
20
10
VIN = VOUT + 1V
VOUT = 3V
0
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Temperature
800
780
760
740
720
700
680
660
VIN = VOUT + 1V
VOUT = 1.5V
640 VBIAS = 3.3V
620
600
COUT = 10µF
IOUT = 100µA
20 40 60 80
TEMPERATURE (°C)
Enable Threshold
2.5
2.0 Room
1.5
1.0 Hot
Cold
0.5
00 0.5 1 1.5 2 2.5 3
ENABLE VOLTAGE (V)
5
MIC49500
Output Voltage
vs. Bias Voltage
1.6
50mA
1.4 2.5A
1.2
1.0
5A
0.8
0.6
0.4 VIN = VOUT + 1V
0.2 VOUT = 1.5V
00
1
COUT = CIN = 10µF
2345
BIAS VOLTAGE (V)
Output Voltage
vs. Temperature
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
VIN = VOUT = 1V
VOUT = 1.5V
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
350
300
250
200
150
100
50
00
Dropout Voltage
vs. Output Current
VIN = VOUT + 1V
VOUT = 1.5V
VBIAS = 3.3V
COUT = 10µF
12345
OUTPUT CURRENT (I)
Current Limit
vs. Input Voltage
10
9
8
7
6
5
4
3 VIN = 2.5V
2 VOUT = 0V
1
VBIAS = 3.3V
COUT = 10µF
20.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
M9999-110805
(408) 955-1690
Free Datasheet http://www.datasheet4u.com/
5 Page 
Micrel, Inc.
MIC49500
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.
© 2005 Micrel, Inc.
November 2005
11 M9999-110805
(408) 955-1690
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MIC49500.PDF ] | |
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