MIC5210-1 [MICREL]
Dual 100mA LDO Regulator Advance Information; 双100毫安LDO稳压器超前信息
| 型号： | MIC5210-1 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Dual 100mA LDO Regulator Advance Information |
| 文件： | 总8页 (文件大小：52K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5210
Dual 100mA LDO Regulator
Advance Information
General Description
Features
The MIC5210 is a dual linear voltage regulator with very low • Micrel Mini 8™ MSOP package
dropout voltage (typically 10mV at light loads and 140mV at • Guaranteed 100mA outputs
100mA),verylowgroundcurrent(225µAat10mAoutput),and • Low quiescent current
better than 3% initial accuracy. It also features individual • Low dropout voltage
logic-compatible enable/shutdown control inputs.
• Wide selection of output voltages
• Tight load and line regulation
• Low temperature coefficient
• Current and thermal limiting
• Reversed input polarity protection
• Zero off-mode current
Designed especially for hand-held battery powered devices,
the MIC5210 can be switched by a CMOS or TTL compatible
logic signal, or the enable pin can be connected to the supply
input for 3-terminal operation. When disabled, power con-
sumption drops nearly to zero. Dropout ground current is
minimized to prolong battery life.
• Logic-controlled electronic enable
Key features include current limiting, overtemperature shut-
down, and protection against reversed battery.
Applications
The MIC5210 is available in 3.0V, 3.3V, 3.6V, 4.0V and 5.0V
fixed voltage configurations. Other voltages are available;
contact Micrel for details.
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery powered equipment
• Bar code scanners
• SMPS post regulator/dc-to-dc modules
• High-efficiency linear power supplies
Ordering Information
Part Number
Voltage
3.0
Accuracy Junction Temp. Range*
Package
MIC5210-3.0BMM
MIC5210-3.3BMM
MIC5210-3.6BMM
MIC5210-4.0BMM
MIC5210-5.0BMM
1.0%
1.0%
1.0%
1.0%
1.0%
–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
8-lead MSOP
8-lead MSOP
8-lead MSOP
8-lead MSOP
8-lead MSOP
3.3
3.6
4.0
5.0
Other voltages available. Contact Micrel for details.
Typical Application
MIC5210
1
2
3
4
8
7
6
5
Output A
Enable A
Enable B
1µF
Output B
2.2µF
1µF
CBYP
470µF
Enable may be connected to V
IN
Low-Noise + Ultralow-Noise (Dual) Regulator
MM8 and Micrel Mini 8 are trademarks of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
April 1997•
1
MIC5210
MIC5210
Micrel
Pin Configuration
1
2
3
4
8
7
6
5
OUTA
GND
INA
ENA
INB
OUTB
BYPB
ENB
MIC5210BMM
Pin Description
Pin Number
Pin Name
OUTA
GND
Pin Function
1
2
3
4
Regulator Output A
Ground: Both pins must be connected together.
Regulator Output B
OUTB
BYPB
Reference Bypass B: Connect external 470pF capacitor to GND to reduce
output noise in regulator “B”. May be left open.
5
ENB
Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
6
7
INB
Supply Input B
ENA
Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
8
INA
Supply Input A
Absolute Maximum Ratings
Recommended Operating Conditions
Supply Input Voltage (V ) ............................ –20V to +20V Supply Input Voltage (V ) ............................... 2.5V to 16V
IN
IN
Enable Input Voltage (V ) ........................... –20V to +20V Enable Input Voltage (V ) ................................. 0V to 16V
EN
EN
Power Dissipation (P ) ............................ Internally Limited
Junction Temperature (T ) ....................... –40°C to +125°C
D
J
Storage Temperature Range ................... –60°C to +150°C 8-lead MSOP (θ ) ................................................... Note 1
JA
Lead Temperature (soldering, 5 sec.) ....................... 260°C
MIC5210
2
April 1997•
MIC5210
Micrel
Electrical Characteristics
VIN = VOUT + 1V; IL = 100µA; CL = 1.0µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.
Symbol
Parameter
Conditions
Min Typical Max
Units
VO
Output Voltage Accuracy
variation from specified VOUT
–1
–2
1
2
%
%
∆VO/∆T
∆VO/VO
∆VO/VO
Output Voltage
Temperature Coefficient
Note 2
40
ppm/°C
Line Regulation
VIN = VOUT + 1V to 16V
IL = 0.1mA to 150mA (Note 3)
0.004 0.012
% / V
% / V
0.05
Load Regulation
0.02
0.2
0.5
%
%
V
IN – VO
Dropout Voltage, Note 4
IL = 100µA
IL = 50mA
IL = 100mA
IL = 150mA
10
50
70
mV
mV
mV
mV
mV
mV
mV
mV
110
140
165
150
230
250
300
275
350
IGND
IGND
Quiescent Current
V
V
EN ≤ 0.4V (shutdown)
EN ≤ 0.18V (shutdown)
0.01
1
5
µA
µA
Ground Pin Current, Note 5
VEN ≥ 2.0V, IL = 100µA
80
350
600
1300
125
150
600
µA
µA
µA
µA
µA
µA
µA
µA
IL = 50mA
IL = 100mA
IL = 150mA
800
1000
1500
1900
2500
PSRR
ILIMIT
Ripple Rejection
Current Limit
frequency = 100Hz, IL = 100µA
75
500
500
dB
mA
VOUT = 0V
320
0.05
260
∆VO/∆PD
eno
Thermal Regulation
Output Noise
Note 6
%/W
nV Hz
IL = 50mA, CL = 2.2µF,
470pF from BYP to GND
ENABLE Input
VIL
Enable Input Logic-Low Voltage
regulator shutdown
regulator enabled
0.4
0.18
V
V
VIH
IIL
Enable Input Logic-High Voltage
Enable Input Current
2.0
V
VIL ≤ 0.4V
VIL ≤ 0.18V
VIH ≥ 2.0V
VIH ≥ 2.0V
0.01
5
–1
–2
20
25
µA
µA
µA
µA
IIH
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when
operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction
temperature, T
, the junction-to-ambient thermal resistance, θ , and the ambient temperature, T . The maximum allowable power
J(max)
JA
A
dissipation at any ambient temperature is calculated using: P
= (T
– T ) θ . Exceeding the maximum allowable power dissipation
D(max)
J(max)
A
JA
will result in excessive die temperature, and the regulator will go into thermal shutdown. The θ of the 8-lead MSOP (MM) is 200°C/W
JA
mounted on a PC board (see “Thermal Considerations” section for further details).
Note 2: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 3: 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.
Note 4: 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.
Note 5: 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.
Note 6: 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 150mA load pulse at V = 16V for t = 10ms.
IN
April 1997•
3
MIC5210
MIC5210
Micrel
Typical Characteristics
Power Supply Ripple Rejection
Turn-On Time
vs. Bypass Capacitance
Dropout Voltage
vs. Output Current
vs. Voltage Drop
60
10000
1000
100
320
280
240
200
160
120
80
50
+125°C
+25°C
1mA
40
30
20
10
0
10mA
IOUT = 100mA
–40°C
COUT = 1µF
40
10
10
0
0
0.1
0.2
0.3
0.4
100
1000
10000
0
40
80
120
160
VOLTAGE DROP (V)
CAPACITANCE (pF)
OUTPUT CURRENT (mA)
Power Supply
Rejection Ratio
Power Supply
Rejection Ratio
Power Supply
Rejection Ratio
0
-20
0
-20
0
-20
VIN = 6V
VIN = 6V
OUT = 5V
VIN = 6V
VOUT = 5V
V
OUT = 5V
V
-40
-40
-40
-60
-60
-60
IOUT = 100mA
OUT = 1µF
-80
-80
-80
IOUT = 10mA
OUT = 1µF
IOUT = 1mA
OUT = 1µF
C
C
C
-100
-100
-100
1E+11E+21E+31E+41E+51E+6 E+7
1E+11E+21E+31E+41E+51E+6 E+7
1E+11E+21E+31E+41E+51E+6 E+7
1k 10k
1M
100k
10M
1k 10k
1M
1k 10k
1M
10 100
100k
10M
10 100
100k
10M
10 100
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
Power Supply
Rejection Ratio
Noise Performance
Noise Performance
0
10
1
10
1
VIN = 6V
OUT = 5V
V
-20
-40
100mA
100mA
10mA
0.1
0.1
-60
0.01
0.001
0.0001
0.01
0.001
0.0001
1mA
VOUT = 5V
OUT = 10µF
electrolytic
BYP = 100pF
VOUT = 5V
OUT = 10µF
electrolytic
1mA
C
-80
IOUT = 100µA
OUT = 1µF
C
10mA
C
C
-100
1E+11E+21E+31E+41E+51E+6 E+7
1k 10k
1M
10M
10 100
100k
1E10+11E+21E1k+31E+41E+51E1M+61E+7
1E10+11E+21E1k+31E+41E+51E1M+61E+7
100
10k 100k 10M
100
10k 100k
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MIC5210
4
April 1997•
MIC5210
Micrel
above 1MHz. Most tantalum or aluminum electrolytic capaci-
tors are adequate; film types will work, but are more expen-
sive. Since many aluminum electrolytics have electrolytes
thatfreezeatabout–30°C, solidtantalumsarerecommended
for operation below –25°C.
Applications Information
Enable/Shutdown
Forcing EN (enable/shutdown) high (> 2V) enables the regu-
lator. EN is compatible with CMOS logic gates.
If the enable/shutdown feature is not required, connect EN to
IN (supply input).
At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to
0.47µF for current below 10mA or 0.33µF for currents below
1mA.
Input Capacitor
A 1µF capacitor should be placed from IN to GND if there is
more than 10 inches of wire between the input and the ac filter
capacitor or if a battery is used as the input.
No-Load Stability
The MIC5210 will remain stable and in regulation with no load
(other than the internal voltage divider) unlike many other
voltageregulators. ThisisespeciallyimportantinCMOSRAM
keep-alive applications.
Reference Bypass Capacitor
BYP (reference bypass) is connected to the internal voltage
reference. A 470pF capacitor (C
) connected from BYP to
BYP
Dual-Supply Operation
GND quiets this reference, providing a significant reduction in
outputnoise. C reducestheregulatorphasemargin;when
When used in dual supply systems where the regulator load
is returned to a negative supply, the output voltage must be
diode clamped to ground.
BYP
using C
, output capacitors of 2.2µF or greater are gener-
BYP
ally required to maintain stability.
The start-up speed of the MIC5210 is inversely proportional to
the size of the reference bypass capacitor. Applications re-
quiring a slow ramp-up of output voltage should consider
Thermal Considerations
Multilayer boards having a ground plane, wide traces near the
pads, and large supply bus lines provide better thermal
conductivity.
larger values of C
consider omitting C
. Likewise, if rapid turn-on is necessary,
.
BYP
BYP
The MIC5210-xxBMM (8-lead MSOP) has a thermal resis-
tance of 200°C/W when mounted on a FR4 board with
minimum trace widths and no ground plane.
If output noise is not a major concern, omit C
BYP open.
and leave
BYP
Output Capacitor
PC Board
Dielectric
θJA
An output capacitor is required between OUT and GND to
prevent oscillation. The minimum size of the output capacitor
is dependent upon whether a reference bypass capacitor is
FR4
200°C
used. 1.0µF minimum is recommended when C
is not
MSOP Thermal Characteristics
BYP
used (see Figure 2). 2.2µF minimum is recommended when
is 470µF (see Figure 1). Larger values improve the
regulator’s transient response. The output capacitor value
may be increased without limit.
For additional heat sink characteristics, please refer to Micrel
Application Hint 17, “Calculating P.C. Board Heat Sink Area
For Surface Mount Packages”.
C
BYP
The output capacitor should have an ESR (effective series
resistance) of about 5Ω or less and a resonant frequency
April 1997•
5
MIC5210
MIC5210
Micrel
Package Information
0.122 (3.10)
0.112 (2.84)
0.199 (5.05)
0.187 (4.74)
DIMENSIONS:
INCH (MM)
0.120 (3.05)
0.116 (2.95)
0.036 (0.90)
0.032 (0.81)
0.043 (1.09)
0.038 (0.97)
0.012 (0.30) R
0.007 (0.18)
0.005 (0.13)
0.008 (0.20)
0.004 (0.10)
5° MAX
0° MIN
0.012 (0.03)
0.012 (0.03) R
0.039 (0.99)
0.0256 (0.65) TYP
0.035 (0.89)
0.021 (0.53)
8-Lead MSOP (MM)
MM8™ Micrel Mini 8™
MIC5210
6
April 1997•
MIC5210
Micrel
April 1997•
7
MIC5210
MIC5210
Micrel
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
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.
© 1997 Micrel Incorporated
MIC5210
8
April 1997•
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