MIC5207-5.0YM5TX [MICROCHIP]
IC,VOLT REGULATOR,FIXED,+5V,BIPOLAR,TSOP,5PIN,PLASTIC;
| 型号： | MIC5207-5.0YM5TX |
| 厂家： | 
MICROCHIP |
| 描述： | IC,VOLT REGULATOR,FIXED,+5V,BIPOLAR,TSOP,5PIN,PLASTIC |
| 文件： | 总13页 (文件大小：401K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5207
180mA Low-Noise LDO Regulator
General Description
Features
The MIC5207 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 (720µA at 100mA output). The MIC5207
offers better than 3% initial accuracy.
• Ultra-low-noise output
• High output voltage accuracy
• Guaranteed 180mA output
• Low quiescent current
• Low dropout voltage
Designed especially for hand-held, battery-powered
devices, the MIC5207 includes a CMOS or TTL compatible
enable/shutdown control input. When in shutdown, power
consumption drops nearly to zero.
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• “Zero” off-mode current
Key MIC5207 features include a reference bypass pin to
improve its already low-noise performance, reversed-
battery protection, current limiting, and overtemperature
shutdown.
• Logic-controlled electronic enable
The MIC5207 is available in fixed and adjustable output
voltage versions in a small SOT-23-5 package. Contact
Micrel for details.
Applications
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• PCMCIA VCC and VPP regulation/switching
• Consumer/personal electronics
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
For low-dropout regulators that are stable with ceramic
output capacitors, see the µCap MIC5245/6/7 family.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Typical Application
Battery-Powered Regulator Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-123107
December 2007
Micrel, Inc.
MIC5207
Ordering Information
Part Number
MIC5207-1.8BD5
MIC5207BM5
Marking
Voltage*
1.8V
Adj.
Junction Temp. Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
5-Pin Thin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
3-Pin TO-92
Lead Finish
NE18
LEAA
LE18
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
MIC5207-1.8BM5
MIC5207-2.5BM5
MIC5207-2.8BM5
MIC5207-3.0BM5
MIC5207-3.2BM5
MIC5207-3.3BM5
MIC5207-3.6BM5
MIC5207-3.8BM5
MIC5207-4.0BM5
MIC5207-5.0BM5
MIC5207-3.3BZ***
MIC5207-1.8YD5
MIC5207YM5
1.8V
2.5V
2.8V
3.0V
3.2V
3.3V
3.6V
3.8V
4.0V
5.0V
3.3V
1.8V
Adj.
LE25
LE28
LE30
LE32
LE33
LE36
LE38
LE40
LE50
--
NE18**
LEAA**
LE18**
LE25**
LE28**
LE29**
LE30**
LE31**
LE32**
LE33**
LE36**
LE38**
LE40**
LE50**
--
5-Pin Thin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
3-Pin TO-92
MIC5207-1.8YM5
MIC5207-2.5YM5
MIC5207-2.8YM5
MIC5207-2.9YM5
MIC5207-3.0YM5
MIC5207-3.1YM5
MIC5207-3.2YM5
MIC5207-3.3YM5
MIC5207-3.6YM5
MIC5207-3.8YM5
MIC5207-4.0YM5
MIC5207-5.0YM5
MIC5207-3.3YZ***
1.8V
2.5V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.6V
3.8V
4.0V
5.0V
3.3V
*
Other voltages available. Contact Micrel for details.
** Under bar ( __ ) symbol may not be to scale.
*** TO-92 Package discontinuance notification issued September 2007. End-of-life-buy offered thru December 31, 2007. Contact factory for
additional information.
M9999-123107
December 2007
2
Micrel, Inc.
MIC5207
Pin Configuration
1
3
2
GND OUT
IN
(Bottom View)
MIC5207BM5/YM5 (M5)
(Adjustable Voltage)
MIC5207-x.xBM5/YM5 (M5)
MIC5207-x.xBD5/YD5 (D5)
(Fixed Voltage)
MIC5207-x.xBZ/YZ (Z)
(Fixed Voltage)
Pin Description
Pin Number
SOT-23-5
Pin Number
TO-92
Pin Name Pin Function
1
2
3
1
2
IN
GND
EN
Supply Input
Ground
Enable/Shutdown (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
4 (fixed)
BYP
Reference Bypass: Connect external 470pF capacitor to GND to reduce output
noise. May be left open. For 1.8V or 2.5V operation, see “Applications
Information.”
4 (adj.)
5
ADJ
Adjust (Input): Adjustable regulator feedback input. Connect to resistor voltage
divider.
3
OUT
Regulator Output
M9999-123107
December 2007
3
Micrel, Inc.
MIC5207
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Input Voltage (VIN).............................. –20V to +20V
Enable Input Voltage (VEN)............................. –20V to +20V
Power Dissipation (PD)..........................Internally Limited (3)
Lead Temperature (soldering, 5 sec)......................... 260°C
Junction Temperature (TJ)
All except 1.8V....................................–40°C to +125°C
1.8V ONLY..............................................0°C to +125°C
Storage Temperature (TS).........................–65°C to +150°C
Supply Input Voltage (VIN)............................. +2.5V to +16V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature (TJ)
All except 1.8V....................................–40°C to +125°C
1.8V ONLY..............................................0°C to +125°C
Thermal Resistance (θJA).......................................... Note 3
MSOP-8 (θJA) (3)
Electrical Characteristics
VIN = VOUT + 1V; IL = 100µA; CL = 1.0µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C < TJ < +125°C except
0°C < TJ < +125°C for 1.8V, unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VO
Output Voltage Accuracy
Variation from nominal VOUT
–3
–4
3
4
%
%
∆VO/∆T
∆VO/VO
∆VO/VO
Output Voltage
Temperature Coefficient
Note 4
40
ppm/°C
Line Regulation
VIN = VOUT + 1V to 16V
IL = 0.1mA to 150mA, Note 5
0.005
0.05
0.05
0.10
%/V
%/V
Load Regulation
0.5
0.7
%
%
VIN
–
VO
Dropout Voltage, Note 6
IL = 100µA
IL = 50mA
IL = 100mA
IL = 150mA
17
60
80
mV
mV
mV
mV
mV
mV
mV
mV
115
140
165
175
250
280
325
300
400
IGND
IGND
Quiescent Current
V
EN ≤ 0.4V (shutdown)
0.01
1
5
µA
µA
VEN ≤ 0.18V (shutdown)
Ground Pin Current, Note 7
VEN ≥ 2.0V, IL = 100µA
80
350
720
1800
130
170
650
µA
µA
µA
µA
µA
µA
µA
µA
IL = 50mA
IL = 100mA
IL = 150mA
900
1100
2000
2500
3000
PSRR
ILIMIT
Ripple Rejection
Current Limit
75
dB
mA
VOUT = 0V
320
0.05
260
500
∆VO/∆PD
eno
Thermal Regulation
Output Noise
Note 8
%/W
IL = 50mA, CL = 2.2µF,
470pF from BYP to GND
nV√Hz
M9999-123107
December 2007
4
Micrel, Inc.
MIC5207
Symbol
Parameter
Condition
Min
2.0
Typ
Max
Units
Enable Input
VIL
Enable Input Logic-Low Voltage Regulator shutdown
0.4
0.18
V
V
VIH
Enable Input Logic-High
Voltage
Regulator enable
V
IIL
Enable Input Current
V
V
IL ≤ 0.4V
IL ≤ 0.18V
0.01
5
–1
–2
20
25
µA
µA
µA
µA
IIH
VIH ≥ 2.0V
VIH ≥ 2.0V
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation at any TA (ambient temperature) is PD(max) = (TJ(max) –TA) / θJA. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The θJA of the SOT-23-5 (M5) is 235°C/W, and the
TO-92 (Z) is 180°C/W (0.4” leads) or 160°C/W (0.25” leads) soldered on a PC board (see “Thermal Considerations” for further details).
4. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
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 180mA. 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 at 1Vdifferential.
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.
8. 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 180mA load pulse at VIN = 16V for t = 10ms.
M9999-123107
December 2007
5
Micrel, Inc.
MIC5207
Typical Characteristics
Power Supply
Rejection Ratio
0
VIN = 6V
VOUT = 5V
-20
-40
-60
-80
IOUT = 100µA
OUT = 1µF
C
-100
1E+11E+21E1+k311E0+k41E+51E1M+6 E+7
10M
10 100
100k
FREQUENCY (Hz)
Power Supply
Rejection Ratio
0
-20
VIN = 6V
VOUT = 5V
-40
-60
-80
IOUT = 1mA
COUT = 1µF
-100
1E+11E+21E1+k311E0+k41E+51E1M+6 E+7
10M
10 100
100k
FREQUENCY (Hz)
Power Supply
Rejection Ratio
Turn-On Time
vs. Bypass Capacitance
0
-20
10000
1000
100
VIN = 6V
OUT = 5V
V
-40
-60
IOUT = 10mA
COUT = 2.2µF
BYP = 0.01µF
-80
C
-100
10
1E+11E+2 1E1+k3 11E0+k4 1E+5 1E1M+6 E+7
10
100k
10M
10
100
1000
10000
100
FREQUENCY (Hz)
CAPACITANCE (pF)
Power Supply
Rejection Ratio
Dropout Voltage
vs. Output Current
0
320
280
240
200
160
120
80
VIN = 6V
OUT = 5V
V
-20
-40
+125°C
+25°C
-60
–40°C
IOUT = 100mA
-80
C
C
OUT = 2.2µF
BYP = 0.01µF
40
-100
0
1E+11E+21E+31E+41E+51E+6 E+7
1k 10k
1M
10M
0
40
80
120
160
10
100k
100
FREQUENCY (Hz)
OUTPUT CURRENT (mA)
M9999-123107
December 2007
6
Micrel, Inc.
MIC5207
Typical Characteristics (continued)
Noise Performance
10
10mA, COUT = 1µF
1
0.1
0.01
1mA
OUT = 1µF
BYP = 10nF
C
C
0.001
VOUT = 5V
0.0001
1E+11E+21E+31E+41E+51E+61E+7
10
1k
100
10k 100k 1M 10M
FREQUENCY (Hz)
Noise Performance
10
1
100mA
0.1
0.01
0.001
0.0001
1mA
10mA
VOUT = 5V
C
OUT = 10µF
electrolytic
BYP = 100pF
C
1E+11E+21E1k+31E+41E+51E+61E+7
10 10k 100k 1M 10M
100
FREQUENCY (Hz)
M9999-123107
December 2007
7
Micrel, Inc.
MIC5207
Block Diagrams
Low-Noise Fixed Regulator (TO-92 version only)
Ultra-Low-Noise Fixed Regulator
Ultra-Low-Noise Adjustable Regulator
M9999-123107
December 2007
8
Micrel, Inc.
MIC5207
No-Load Stability
Application Information
The MIC5207 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
CMOSRAM keep-alive applications.
Enable/Shutdown
Forcing EN (enable/shutdown) high (> 2V) enables the
regulator. EN is compatible with CMOS logic gates.
If the enable/shutdown feature is not required, connect
EN (pin 3) to IN (supply input, pin 1). See Figure 1.
Thermal Considerations
The MIC5207 is designed to provide 180mA of
continuous current in a very small package. Maximum
power dissipation can be calculated based on the output
current and the voltage drop across the part. To
determine the maximum power dissipation of the
package, use the junction-to-ambient thermal resistance
of the device and the following basic equation:
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.
Reference Bypass Capacitor
TJ(MAX) − TA
BYP (reference bypass) is connected to the internal
voltage reference. A 470pF capacitor (CBYP) connected
from BYP to GND quiets this reference, providing a
significant reduction in output noise. CBYP reduces the
regulator phase margin; when using CBYP, output
capacitors of 2.2µF or greater are generally required to
maintain stability.
PD(MAX)
=
θJA
TJ(max) is the maximum junction temperature of the die,
125°C, and TA is the ambient operating temperature. θJA
is layout dependent; Table 1 shows examples of
junction-to-ambient thermal resistance for the MIC5207.
Package
θ
JA Recommemded
Minimum Footprint
θ
JA 1” Square
Copper Clad
θJ/C
The start-up speed of the MIC5207 is inversely
proportional to the size of the reference bypass
capacitor. Applications requiring a slow ramp-up of
SOT-23-5
(M5)
235°C/W
170°C/W
130°C/W
output voltage should consider larger values of CBYP
Likewise, if rapid turn-on is necessary, consider omitting
CBYP
.
Table 1. SOT-23-5 Thermal Resistance
.
If output noise is not a major concern, omit CBYP and
leave BYP open.
The actual power dissipation of the regulator circuit can
be determined using the equation:
PD
=
VIN − VOUT IOUT + VIN IGND
)
Output Capacitor
Substituting PD(max) for PD and solving for the operating
conditions that are critical to the application will give the
maximum operating conditions for the regulator circuit.
For example, when operating the MIC5207-3.3BM5 at
room temperature with a minimum footprint layout, the
maximum input voltage for a set output current can be
determined as follows:
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 used. 1.0µF minimum is recommended
when CBYP is not used (see Figure 2). 2.2µF minimum
is recommended when CBYP is 470pF (see Figure 1).
Larger values improve the regulator’s transient
response. The output capacitor value may be increased
without limit.
125°C − 25°C
PD(MAX)
=
235
The output capacitor should have an ESR (effective
series resistance) of about 5Ω or less and a resonant
frequency above 1MHz. Ultra-low-ESR capacitors can
cause a low amplitude oscillation on the output and/or
under-damped transient response. Most tantalum or
aluminum electrolytic capacitors are adequate; film types
will work, but are more expensive. Since many aluminum
electrolytics have electrolytes that freeze at about
–30°C, solid tantalums are recommended for operation
below –25°C.
PD(MAX) = 425mW
The junction-to-ambient thermal resistance for the
minimum footprint is 220°C/W, from Table 1. The
maximum power dissipation must not be exceeded for
proper operation. Using the output voltage of 3.3V and
an output current of 150mA, the maximum input voltage
can be determined. From the Electrical Characteristics
table, the maximum ground current for 150mA output
current is 3000µA or 3mA.
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.
455mW =
VIN − 3.3 150mA + VIN ⋅ 3mA
)
455mW = VIN ⋅150mA - 495mW + VIN ⋅ 3mA
920mW = VIN ⋅153mA
M9999-123107
December 2007
9
Micrel, Inc.
VIN(MAX) = 6.01V
MIC5207
Therefore, a 3.3V application at 150mA of output current
can accept a maximum input voltage of 6V in a SOT-23-
5 package. For a full discussion of heat sinking and
thermal effects on voltage regulators, refer to the
Regulator Thermals section of Micrel’s Designing with
Low-Dropout Voltage Regulators handbook
Figure 2. Low-Noise Fixed Voltage Application
Low-Voltage Operation
Figure
2
is an example of
a
basic low-noise
The MIC5207-1.8 and MIC5207-2.5 require special
consideration when used in voltage-sensitive systems.
They may momentarily overshoot their nominal output
voltages unless appropriate output and bypass capacitor
values are chosen.
configuration. COUT = 1µF minimum.
Adjustable Regulator Applications
The MIC5207BM5 can be adjusted to a specific output
voltage by using two external resistors (Figure 3). The
resistors set the output voltage based on the following
equation:
During regulator power up, the pass transistor is fully
saturated for a short time, while the error amplifier and
voltage reference are being powered up more slowly
from the output (see “Block Diagram”). Selecting larger
output and bypass capacitors allows additional time for
the error amplifier and reference to turn on and prevent
overshoot.
R2
R1
⎛
⎞
VOUT = VREF 1+
, V
= 1.242V
⎜
⎟
REF
⎝
⎠
This equation is correct due to the configuration of the
bandgap reference. The bandgap voltage is relative to
the output, as seen in the block diagram. Traditional
regulators normally have the reference voltage relative
to ground; therefore, their equations are different from
the equation for the MIC5207BM5.
To ensure that no overshoot is present when starting up
into a light load (100µA), use a 4.7µF output capacitance
and 470pF bypass capacitance. This slows the turn-on
enough to allow the regulator to react and keep the
output voltage from exceeding its nominal value. At
heavier loads, use a 10µF output capacitance and
470pF bypass capacitance. Lower values of output and
bypass capacitance can be used, depending on the
sensitivity of the system.
Resistor values are not critical because ADJ (adjust) has
a high input impedance, but for best results use resistors
of 470kΩ or less. A capacitor from ADJ to ground
provides greatly improved noise performance.
Applications that can withstand some overshoot on the
output of the regulator can reduce the output capacitor
and/or reduce or eliminate the bypass capacitor.
Applications that are not sensitive to overshoot due to
power-on reset delays can use normal output and
bypass capacitor configurations.
Please note the junction temperature range of the
regulator at 1.8V output (fixed and adjustable) is 0˚C to
+125˚C.
Figure 3. Ultra-Low-Noise Adjustable Voltage Application
Figure 3 includes the optional 470pF noise bypass
capacitor from ADJ to GND to reduce output noise.
Fixed Regulator Applications
Dual-Supply Operation
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.
USB Application
Figure 4 shows the MIC5207-3.3BZ (3-terminal, TO-92)
in a USB application. Since the VBUS supply may be
greater than 10 inches from the regulator, a 1µF input
capacitor is included.
Figure 1. Ultra-Low-Noise Fixed Voltage Application
Figure 1 includes a 470pF capacitor for ultra-low-noise
operation and shows EN (pin 3) connected to IN (pin 1)
for an application where enable/shutdown is not
required. COUT = 2.2µF minimum.
M9999-123107
December 2007
10
Micrel, Inc.
MIC5207
Figure 4. Single-Port Self-Powered Hub
M9999-123107
December 2007
11
Micrel, Inc.
MIC5207
Package Information
5-Pin SOT-23 (M5)
5-Pin Thin SOT-23 (D5)
M9999-123107
December 2007
12
Micrel, Inc.
MIC5207
0.090 (2.286) Radius, typ.
1
2
3
0.145 (3.683)
0.135 (3.429)
0.055 (1.397)
0.045 (1.143)
10° typ.
BOTTOM VIEW
0.085 (2.159) Diam.
0.185 (4.699)
0.175 (4.445)
5° typ.
5° typ.
0.185 (4.699)
0.175 (4.445)
0.090 (2.286) typ.
Seating Plane
0.025 (0.635) Max
Uncontrolled
Lead Diameter
0.500 (12.70) Min.
0.016 (0.406)
0.014 (0.356)
0.0155 (0.3937)
0.0145 (0.3683)
0.055 (1.397)
0.045 (1.143)
0.105 (2.667)
0.095 (2.413)
3-Pin TO-92 (Z)
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.
© 2001 Micrel, Incorporated.
M9999-123107
December 2007
13
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ROCHESTER
MIC5207YM5T&R
1.2 V-16V ADJUSTABLE POSITIVE LDO REGULATOR, 0.4V DROPOUT, PDSO5, SOT-23, 5 PIN
MICROCHIP
MIC5207YM5TR
ADJUSTABLE POSITIVE LDO REGULATOR, 0.4V DROPOUT, PDSO5, LEAD FREE, SOT-23, 5 PIN
MICROCHIP
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