MIC39151-1.65BU [ROCHESTER]
1.65V FIXED POSITIVE LDO REGULATOR, 0.5V DROPOUT, PSSO5, TO-263, 5 PIN;
| 型号： | MIC39151-1.65BU |
| 厂家： | 
Rochester Electronics |
| 描述： | 1.65V FIXED POSITIVE LDO REGULATOR, 0.5V DROPOUT, PSSO5, TO-263, 5 PIN 输出元件 调节器 |
| 文件： | 总15页 (文件大小：992K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC39150/39151/39152
1.5A, Low-Voltage Low-Dropout
Regulator
General Description
Features
The MIC39150, MIC39151, and MIC39152 are 1.5A LDO
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super βeta PNP® pass element, the
MIC39150/1/2 offers extremely low dropout (typically
375mV at 1.5A) and low ground current (typically 17mA at
1.5A).
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
– Ideal for 3.0V to 2.5V conversion
– Ideal for 2.5 to 1.8V or 1.65V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
The MIC39150/1/2 are ideal for PC add-in cards that need
to convert from 3.3V to 2.5V or 2.5V to 1.8V with a
guaranteed maximum dropout voltage of 500mV over all
operating conditions. The MIC39150/1/2 exhibit fast
transient response for heavy switching applications and
requires only 10µF of output capacitance to maintain
stability and achieve fast transient response.
• Fast transient response
• TTL/CMOS compatible enable pin (MIC39151/2 only)
• Error flag output (MIC39151 only)
• Adjustable output (MIC39152 only)
• Power D-Pak package (TO-252) Adjustable only
• Power D2Pak package (TO-263)
The MIC39150/1/2 is fully protected with current limiting,
thermal shutdown, reversed-battery protection/lead
insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag
that indicates undervoltage and overcurrent conditions.
Offered in fixed voltages of 2.5V, 1.8V and 1.65V, the
MIC39150/1 comes in the TO-220 and TO-263 (D2Pak)
packages. The MIC39152 adjustable option allows
programming the output voltage anywhere between 1.24V
and 15.5V and comes in 5-Pin, TO-263 (D2Pak) and
TO-252 (D-Pak) packages.
Applications
• Low-voltage digital ICs
• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Low-voltage microcontrollers
• StrongARM™ processor supply
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Typical Application**
MIC39150
MIC39151
MIC39152 Adjustable Output Application
(*See Minimum Load Current Section)
**See Thermal Design Section
Super ßeta PNP is a registered trademark of Micrel, Inc.
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-102309-A
October 2009
Micrel, Inc.
MIC39150/39151/39152
Ordering Information
Part Number
Junction
Temp. Range
Voltage
Package
Standard
MIC39150-1.65BT
MIC39150-1.65BU
MIC39150-1.8BT
MIC39150-1.8BU
MIC39150-2.5BT
MIC39150-2.5BU
MIC39151-1.65BT
MIC39151-1.65BU
MIC39151-1.8BT
MIC39151-1.8BU
MIC39151-2.5BT
MIC39151-2.5BU
—
RoHS Compliant*
MIC39150-1.65WT
MIC39150-1.65WU
MIC39150-1.8WT
MIC39150-1.8WU
MIC39150-2.5WT
MIC39150-2.5WU
MIC39151-1.65WT
MIC39151-1.65WU
MIC39151-1.8WT
MIC39151-1.8WU
MIC39151-2.5WT
MIC39151-2.5WU
MIC39152WU
1.65V
1.65V
1.8V
–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
3-Pin TO-220
3-Pin TO-263
3-Pin TO-220
3-Pin TO-263
3-Pin TO-220
3-Pin TO-263
5-Pin TO-220
5-Pin TO-263
5-Pin TO-220
5-Pin TO-263
5-Pin TO-220
5-Pin TO-263
5-Pin TO-263
5-Pin TO-252
1.8V
2.5V
2.5V
1.65V
1.65V
1.8V
1.8V
2.5V
2.5V
Adjustable
Adjustable
—
MIC39152WD
Note:
* RoHS compliant with ‘high-melting solder’ exemption.
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
Pin Configuration
3
2
1
OUT
GND
IN
3
2
1
OUT
GND
IN
MIC39150-x.xBT/WT
MIC39150-x.xBU/WU
TO-263-3 (U)
TO-220-3 (T)
5
4
3
2
1
FLG
OUT
GND
IN
EN
MIC39151-x.xBT/WT
TO-220-5 (T)
MIC39151-x.xBU/WU
TO-263-5 (D2Pak) (U)
MIC39152WU
MIC39152WD
TO-252-5 (D-Pak) (D)
TO-263-5 (D2Pak) (U))
Pin Description
Pin Number
MIC39150
Pin Number
MIC39151
1
Pin Number
MIC39152
1
Pin Name
Pin Description
—
EN
Enable (Input): TTL/CMOS compatible input. Logic high =
enable; logic low or open = shutdown.
1
2, TAB
3
2
2
3, TAB
4
IN
Unregulated Input: +16V maximum supply.
Ground: Ground pin and TAB are internally connected.
Regulator Output.
3, TAB
GND
OUT
FLG
4
5
—
Error Flag (Output): Open-collector output. Active low
indicates an output fault condition.
—
—
5
ADJ
Adjustable Regulator Feedback Input: Connect to the
resistor voltage divider that is placed from OUT to GND in
order to set the output voltage.
—
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Micrel, Inc.
MIC39150/39151/39152
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN)....................................... –20V to +20V
Enable Voltage (VEN)....................................................+20V
Storage Temperature (Ts) .........................–60°C to +150°C
Lead Temperature (soldering, 5 sec.)........................ 260°C
ESD Rating................................................................ Note 3
Supply Voltage (VIN).................................... +2.25V to +16V
Enable Voltage (VEN)....................................................+16V
Maximum Power Dissipation (PD(max)) ....................... Note 4
Junction Temperature (TJ) ........................–40°C to +125°C
Package Thermal Resistance
TO-263 (θJC) ........................................................2°C/W
TO-220 (θJC) ........................................................2°C/W
TO-252 (θJC) ........................................................3°C/W
TO-252 (θJA) ......................................................56°C/W
Electrical Characteristics(5)
VIN = VEN = VOUT + 1V; IOUT = 10mA; TJ = 25°C, bold values indicate –40°C< TJ < +125°C, unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VOUT
Output Voltage
10mA
–1
–2
1
2
%
%
10mA ≤ IOUT ≤ 1.5A, VOUT + 1V ≤ VIN ≤ 8V
Line Regulation
Load Regulation
IOUT = 10mA, VOUT + 1V ≤ VIN ≤ 16V
VIN = VOUT + 1V, 10mA ≤ IOUT ≤ 1.5A
0.06
0.2
20
0.5
1
%
%
∆VOUT/∆T Output Voltage Temp.
Coefficient, Note 6
100
ppm/°C
VDO
Dropout Voltage, Note 7
Ground Current, Note 8
IOUT = 100mA, ∆VOUT = –1%
IOUT = 750mA, ∆VOUT = –1%
IOUT = 1.5A, ∆VOUT = –1%
80
260
375
4
200
mV
mV
mV
mA
mA
mA
A
500
20
IGND
IOUT = 750mA, VIN = VOUT + 1V
IOUT = 1.5A, VIN = VOUT + 1V
VIN ≤ VOUT(nominal) – 0.5V, IOUT = 10mA
VOUT = 0V, VIN = VOUT + 1V
17
1.1
2.8
7
IGND(do)
IOUT(lim)
IOUT(min)
tSTART
Dropout Ground Pin Current
Current Limit
Minimum Load Current
Start-up Time
10
mA
µs
VEN = VIN, IOUT = 10mA, COUT = 47µF
35
150
Enable Input (MIC39151)
VEN Enable Input Voltage
logic low (off)
logic high (on)
VEN = 2.25V
0.8
V
V
2.25
IIN
Enable Input Current
1
15
10
30
75
µA
µA
VEN = 0.8V
2
4
µA
µA
IOUT(shdn)
Shutdown Output Voltage
Note 9
20
µA
Flag Output (MIC39151)
IFLG(leak)
VFLG(do)
VFLG
Output Leakage Current
VOH = 16V
0.01
180
1
2
µA
µA
Output Low Voltage
VIN = 2.250V, IOL = 250µA, Note 10
300
400
mV
mV
Low Threshold
High Threshold
Hysteresis
% of VOUT
% of VOUT
93
%
%
%
99.2
1
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
Symbol
Parameter
Condition
Min
Typ
Max
Units
Reference (Adjust Pin) – MIC39152 Only
VADJ
Reference Voltage
1.228
1.240
1.252
V
V
1.215
1.265
VTC
Reference Voltage Temperature Note 11
Coefficient
20
40
ppm/°C
IADJ
Adjust Pin Bias Current
80
nA
nA
120
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. PD(max) = (TJ(max) – TA) ÷ θJA, where θJA depends upon the printed circuit layout. See “Applications Information.”
5. Specification for packaged product only.
6. Output voltage temperature coefficient is ∆VOUT(worst case) ÷ (TJ(max) – TJ(min)) where T J(max) is +125°C and TJ(min) is –40°C.
7. VDO = VIN – VOUT when VOUT decreases to 98% of its nominal output voltage with VIN = VOUT + 1V. For output voltages below 2.25V, dropout voltage is
the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage is 2.25V.
8. IGND is the quiescent current. IIN = IGND + IOUT
.
9. VEN ≤ 0.8V, VIN ≤ 8V, and VOUT = 0V.
10. For a 2.5V device, VIN = 2.250V (device is in dropout).
11. 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 200mA load pulse at VIN = 8V for t = 10ms.
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
Typical Characteristics
Power Supply
Rejection Ratio
60
VIN = 3.3V
V
OUT = 2.5V
50
40
30
20
10
0
ILOAD = 1.5A
OUT = 10µF
IN = 0
C
C
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6
1k
10k
1M
10 100
100k
FREQUENCY (Hz)
Dropout Voltage
vs. Temperature
Ground Current
Dropout Characteristics
vs. Output Current
600
500
400
300
200
100
0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
25
20
15
10
5
ILOAD = 100mA
VOUT = 1.8V
VOUT = 2.5V
VOUT = 1.8V
ILOAD = 1.5A
ILOAD = 1.5A
ILOAD = 750mA
VOUT = 2.5V
0
0
250 500 750 100012501500
OUTPUT CURRENT (mA)
-40 -20
0
20 40 60 80 100 120
TEMPERATURE°(C)
INPUT VOLTAGE (V)
Ground Current
vs. Temperature
Ground Current
vs. Supply Voltage
0.36
0.35
0.34
0.33
0.32
0.31
0.30
65
60
55
50
45
40
35
30
25
20
15
10
5
ILOAD = 1500mA
VOUT = 1.8V
ILOAD = 1000mA
ILOAD = 750mA
VOUT = 2.5V
ILOAD = 10mA
0
0
2
4
6
8
10 12
-40 -20
0 20 40 60 80 100120
SUPPLY VOLTAGE (V)
TEMPERATURE°(C)
Ground Current
vs. Temperature
Short Circuit vs.
Temperature
25
20
15
10
5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
typical 2.5V device
VOUT = 2.5V
typical 1.8V device
VOUT = 1.8V
ILOAD = 1.5A
0
-40 -20
0
20 40 60 80 100120
-40 -20
0
20 40 60 80 100120
TEMPERATURE°(C)
TEMPERATURE°(C)
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Micrel, Inc.
MIC39150/39151/39152
Error Flag
Pull-Up Resistor
6
5
4
3
2
1
0
VIN = 5V
FLAG HIGH
(OK)
FLAG LOW
(FAULT)
0.01 0.1
1
10 100 100010000
RESISTANCE (k )
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
Functional Characteristics
M9999-102309-A
October 2009
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Micrel, Inc.
MIC39150/39151/39152
Functional Diagram
IN
OUT
O.V.
ILIMIT
18V
1.180V
1.240V
Ref.
FLAG*
EN*
Thermal
Shut-
down
GND
* MIC39151 only
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
distribute the heat between this resistor and the
regulator. The low dropout properties of Micrel Super
βeta PNP® regulators allow significant reductions in
regulator power dissipation and the associated heat sink
without compromising performance. When this technique
is employed, a capacitor of at least 1µF is needed
directly between the input and regulator ground.
Application Information
The MIC39150/1/2 are high-performance, low-dropout
voltage regulators suitable for moderate to high-current
voltage regulator applications. Its 500mV dropout
voltage at full load and overtemperature makes it
especially valuable in battery-powered systems and as
high-efficiency noise filters in post-regulator applications.
Unlike older NPN-pass transistor designs, where the
minimum dropout voltage is limited by the base-to-
emitter voltage drop and collector-to-emitter saturation
voltage, dropout performance of the PNP output of these
devices is limited only by the low VCE saturation voltage.
Refer to Application Note 9 for further details and
examples on thermal design and heat sink specification.
With no heat sink in the application, calculate the
junction temperature to determine the maximum power
dissipation that will be allowed before exceeding the
maximum junction temperature of the MIC39152. The
maximum power allowed can be calculated using the
thermal resistance (θJA) of the TO-252 (D-Pak) adhering
to the following criteria for the PCB design: 2 oz. copper
and 100mm2 copper area for the MIC39152.
A trade-off for the low dropout voltage is a varying base
drive requirement. Micrel’s Super βeta PNP® process
reduces this drive requirement to only 2% to 5% of the
load current. The MIC39150/1/2 regulators are fully
protected from damage due to fault conditions. Current
limiting is provided. This limiting is linear; output current
during overload conditions is constant. Thermal
shutdown disables the device when the die temperature
exceeds the maximum safe operating temperature.
Transient protection allows device (and load) survival
even when the input voltage spikes above and below
nominal. The output structure of these regulators allows
voltages in excess of the desired output voltage to be
applied without reverse current flow.
For example, given an expected maximum ambient
temperature (TA) of 75°C with VIN = 2.25V, VOUT = 1.75V,
and IOUT = 1.5A, first calculate the expected PD using
Equation (1);
PD = (2.25V – 1.75V)1.5A + (2.25V)(0.017A) = 0.788W
Next, calcualte the junction temperature for the expected
power dissipation.
TJ = (θJA × PD) + TA = (56°C/W × 0.788W) + 75°C
= 119.14°C
Now determine the maximum power dissipation allowed
that would not exceed the IC’s maximum junction
temperature (125°C) without the use of a heat sink by
Thermal Design
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. Thermal design requires the following
application-specific parameters:
PD(MAX) = (TJ(MAX) – TA)/θJA = (125°C – 75°C)/(56°C/W)
• Maximum ambient temperature (TA)
= 0.893W
• Output Current (IOUT
)
• Output Voltage (VOUT
• Input Voltage (VIN)
)
MIC39150-x.x
VIN
VOUT
IN
OUT
GND
• Ground Current (IGND
)
First, calculate the power dissipation of the regulator
from these numbers and the device parameters from this
datasheet.
CIN
COUT
PD = (VIN − VOUT )IOUT + VIN IGND
Figure 1. Capacitor Requirements
where the ground current is approximated by using
numbers from the “Electrical Characteristics” or “Typical
Characteristics.” Then the heat sink thermal resistance is
determined with this formula:
Output Capacitor
The MIC39150/1/2 requires an output capacitor to
maintain stability and improve transient response. See
Figure 1. Proper capacitor selection is important to
ensure proper operation. TheMIC39150/1/2 output
capacitor selection is dependent upon the ESR
(equivalent series resistance) of the output capacitor to
maintain stability. When the output capacitor is 10µF or
greater, the output capacitor should have an ESR less
than 2Ω. This will improve transient response as well as
TJ(max) − TA
θSA
=
−
(
θJC + θCS
)
PD
Where TJ(max) ≤ 125°C and θCS is between 0° and 2°C/W.
The heat sink may be significantly reduced in
applications where the minimum input voltage is known
and is large compared with the dropout voltage. Use a
series input resistor to drop excessive voltage and
M9999-102309-A
October 2009
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Micrel, Inc.
MIC39150/39151/39152
promote stability. Ultralow ESR capacitors (<100mΩ),
such as ceramic chip capacitors may promote instability.
These very low ESR levels may cause an oscillation
and/or underdamped transient response. A low-ESR
solid tantalum capacitor works extremely well and
provides good transient response and stability over
temperature. Aluminum electrolytics can also be used,
as long as the ESR of the capacitor is < 2Ω.
Error Flag
The MIC39151 version features an error flag circuit
which monitors the output voltage and signals an error
condition when the voltage 5% below the nominal output
voltage. The error flag is an open-collector output that
can sink 10mA during a fault condition.
Low output voltage can be caused by a number of
problems, including an overcurrent fault (device in
current limit) or low input voltage. The flag is inoperative
during overtemperature shutdown.
The value of the output capacitor can be increased
without limit. Higher capacitance values help to improve
transient response and ripple rejection and reduce
output noise.
When the error flag is not used, it is best to leave it
open. A pull-up resistor from FLG to either VIN or VOUT is
required for proper operation.
Input Capacitor
An input capacitor of 1µF or greater is recommended
when the device is more than 4 inches away from the
bulk ac supply capacitance, or when the supply is a
battery. Small, surface-mount, ceramic chip capacitors
can be used for the bypassing. The capacitor should be
placed within 1" of the device for optimal performance.
Larger values will help to improve ripple rejection by
bypassing the input to the regulator, further improving
the integrity of the output voltage.
Enable Input
The MIC39151/2 features an enable input for on/off
control of the device. The enable input’s shutdown state
draws “zero” current (only microamperes of leakage).
The enable input is TTL/CMOS compatible for simple
logic interface, but can be connected to up to 20V. When
enabled, it draws approximately 15µA.
Adjustable Regulator Design
Transient Response and 3.3V to 2.5Vor 2.5V to 1.8V
Conversion
The MIC39150/1/2 has excellent transient response to
variations in input voltage and load current. The device
has been designed to respond quickly to load current
variations and input voltage variations. Large output
capacitors are not required to obtain this performance. A
standard 10µF output capacitor, preferably tantalum, is
all that is required. Larger values help to improve
performance even further.
By virtue of its low-dropout voltage, this device does not
saturate into dropout as readily as similar NPN-based
designs. When converting from 3.3V to 2.5V, or 2.5V to
1.8V, the NPN-based regulators are already operating in
dropout, with typical dropout requirements of 1.2V or
greater. To convert down to 2.5V without operating in
dropout, NPN-based regulators require an input voltage
of 3.7V at the very least. The MIC39150/1 regulator will
provide excellent performance with an input as low as
3.0V or 2.5V, respectively. This gives the PNP-based
regulators a distinct advantage over older, NPN-based
linear regulators.
Figure 2. Adjustable Regulator with Resistors
The MIC39152 allows programming the output voltage
anywhere between 1.24V and 15.5V. Two resistors are
used. The resistor values are calculated by:
V
⎛
⎞
OUT
R1= R2× ⎜
−1⎟
⎜
⎟
1.240
⎝
⎠
Where VOUT is the desired output voltage. Figure 2
shows component definition. Applications with widely
varying load currents may scale the resistors to draw the
minimum load current required for proper operation (see
Minimum Load Current section).
Minimum Load Current
The MIC39150 regulator is specified between finite
loads. If the output current is too small, leakage currents
dominate and the output voltage rises. A 10mA minimum
load current is necessary for proper regulation.
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
Package Information
3-Pin TO-220 (T)
5-Pin TO-220 (T)
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
3-Pin TO-263 (U)
θ4
θ1
θ2
θ1
θ3
θ1
θ2
θ3
θ4
5-Pin TO-263 (U)
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October 2009
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Micrel, Inc.
MIC39150/39151/39152
5-Pin TO-252 (D)
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.
© 2009 Micrel, Incorporated.
M9999-102309-A
October 2009
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