Micrel MIC29151-3.3BU High-current low-dropout regulator Datasheet

MIC29150/29300/29500/29750
Micrel
MIC29150/29300/29500/29750 Series
High-Current Low-Dropout Regulators
General Description
Features
The MIC29150/29300/29500/29750 are high current, high
accuracy, low-dropout voltage regulators. Using Micrel's
proprietary Super ßeta PNP™ process with a PNP pass
element, these regulators feature 300mV to 370mV (full load)
dropout voltages and very low ground current. Designed for
high current loads, these devices also find applications in
lower current, extremely low dropout-critical systems, where
their tiny dropout voltage and ground current values are
important attributes.
The MIC29150/29300/29500/29750 are fully protected against
overcurrent faults, reversed input polarity, reversed lead
insertion, overtemperature operation, and positive and negative transient voltage spikes. Five pin fixed voltage versions
feature logic level ON/OFF control and an error flag which
signals whenever the output falls out of regulation. Flagged
states include low input voltage (dropout), output current
limit, overtemperature shutdown, and extremely high voltage
spikes on the input.
On the MIC29xx1 and MIC29xx2, the ENABLE pin may be
tied to VIN if it is not required for ON/OFF control. The
MIC29150/29300/29500 are available in 3- and 5-pin TO-220
and surface mount TO-263 packages. The MIC29750 7.5A
regulators are available in 3- and 5-pin TO-247 packages.
• High Current Capability
MIC29150/29151/29152/29153 ................................ 1.5A
MIC29300/29301/29302/29303 ................................... 3A
MIC29500/29501/29502/29503 ................................... 5A
MIC29750/29751/29752 ........................................... 7.5A
• Low-Dropout Voltage ....................... 350mV at Full Load
• Low Ground Current
• Accurate 1% Guaranteed Tolerance
• Extremely Fast Transient Response
• Reverse-battery and “Load Dump” Protection
• Zero-Current Shutdown Mode (5-Pin versions)
• Error Flag Signals Output Out-of-Regulation
(5-Pin versions)
• Also Characterized For Smaller Loads With IndustryLeading Performance Specifications
• Fixed Voltage and Adjustable Versions
Applications
•
•
•
•
•
Battery Powered Equipment
High-Efficiency “Green” Computer Systems
Automotive Electronics
High-Efficiency Linear Power Supplies
High-Efficiency Post-Regulator For Switching Supply
Pin Configuration
1 2 3
1 23 4 5
MIC29150/29300BU
MIC29151/29152/29153BU
MIC29301/29302/29303BU
MIC29501/29502/29503BU
Pinout On all devices, the Tab is grounded.
MIC29150/29300/29500/29750 Three Terminal
Devices:
Pin 1 = Input, 2 = Ground, 3 = Output
MIC29151/29301/29501/29751 Five Terminal
Fixed Voltage Devices:
Pin 1 = Enable, 2 = Input, 3 = Ground, 4 = Output,
5 = Flag
1 2 3
1 23 45
MIC29150/29300/
29500BT and
MIC29750BWT
MIC29151/29152/29153BT
MIC29301/29302/29303BT
MIC29501/29502/29503BT
MIC29751/29752BWT
MIC29152/29302/29502/29752 Adjustable with
ON/OFF Control
Pin 1 = Enable, 2 = Input, 3 = Ground, 4 = Output,
5 = Adjust
MIC29153/29303/29503 Adjustable with Flag
Pin 1 = Flag, 2 = Input, 3 = Ground, 4 = Output,
5 = Adjust
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
March 2000
1
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Ordering Information
Part Number
Temp. Range* Volts Current Package
Part Number
Temp. Range* Volts Current Package
MIC29150-3.3BT
–40 to +125°C
3.3
1.5A
TO-220
MIC29500-3.3BT
–40 to +125°C
3.3
5.0A
TO-220
MIC29150-4.2BT
–40 to +125°C
4.2
1.5A
TO-220
MIC29500-5.0BT
–40 to +125°C
5.0
5.0A
TO-220
MIC29150-5.0BT
–40 to +125°C
5.0
1.5A
TO-220
MIC29501-3.3BT
–40 to +125°C
3.3
5.0A
TO-220-5
MIC29150-12BT
–40 to +125°C
12
1.5A
TO-220
MIC29501-5.0BT
–40 to +125°C
5.0
5.0A
TO-220-5
MIC29150-3.3BU
–40 to +125°C
3.3
1.5A
TO-263
MIC29501-3.3BU
–40 to +125°C
3.3
5.0A
TO-263-5
MIC29150-5.0BU
–40 to +125°C
5.0
1.5A
TO-263
MIC29501-5.0BU
–40 to +125°C
5.0
5.0A
TO-263-5
MIC29150-12BU
–40 to +125°C
12
1.5A
TO-263
MIC29502BT
–40 to +125°C
Adj
5.0A
TO-220-5
MIC29151-3.3BT
–40 to +125°C
3.3
1.5A
TO-220-5
MIC29502BU
–40 to +125°C
Adj
5.0A
TO-263-5
MIC29151-5.0BT
–40 to +125°C
5.0
1.5A
TO-220-5
MIC29503BT
–40 to +125°C
Adj
5.0A
TO-220-5
MIC29151-12BT
–40 to +125°C
12
1.5A
TO-220-5
MIC29503BU
–40 to +125°C
Adj
5.0A
TO-263-5
MIC29151-3.3BU
–40 to +125°C
3.3
1.5A
TO-263-5
MIC29750-3.3BWT
–40 to +125°C
3.3
7.5A
TO-247-3
MIC29151-5.0BU
–40 to +125°C
5.0
1.5A
TO-263-5
MIC29750-5.0BWT
–40 to +125°C
5.0
7.5A
TO-247-3
MIC29151-12BU
–40 to +125°C
12
1.5A
TO-263-5
MIC29751-3.3BWT
–40 to +125°C
3.3
7.5A
TO-247-5
MIC29152BT
–40 to +125°C
Adj
1.5A
TO-220-5
MIC29751-5.0BWT
–40 to +125°C
5.0
7.5A
TO-247-5
MIC29152BU
–40 to +125°C
Adj
1.5A
TO-263-5
MIC29752BWT
–40 to +125°C
Adj
7.5A
TO-247-5
MIC29153BT
–40 to +125°C
Adj
1.5A
TO-220-5
MIC29153BU
–40 to +125°C
Adj
1.5A
TO-263-5
MIC29300-3.3BT
–40 to +125°C
3.3
3.0A
TO-220
MIC29300-5.0BT
–40 to +125°C
5.0
3.0A
TO-220
MIC29300-12BT
–40 to +125°C
12
3.0A
TO-220
MIC29300-3.3BU
–40 to +125°C
3.3
3.0A
TO-263
MIC29300-5.0BU
–40 to +125°C
5.0
3.0A
TO-263
MIC29300-12BU
–40 to +125°C
12
3.0A
TO-263
MIC29301-3.3BT
–40 to +125°C
3.3
3.0A
TO-220-5
MIC29301-5.0BT
–40 to +125°C
5.0
3.0A
TO-220-5
MIC29301-12BT
–40 to +125°C
12
3.0A
TO-220-5
MIC29301-3.3BU
–40 to +125°C
3.3
3.0A
TO-263-5
MIC29301-5.0BU
–40 to +125°C
5.0
3.0A
TO-263-5
MIC29301-12BU
–40 to +125°C
12
3.0A
TO-263-5
MIC29302BT
–40 to +125°C
Adj
3.0A
TO-220-5
MIC29302BU
–40 to +125°C
Adj
3.0A
TO-263-5
MIC29303BT
–40 to +125°C
Adj
3.0A
TO-220-5
MIC29303BU
–40 to +125°C
Adj
3.0A
TO-263-5
* Junction Temperature
MIC29xx0 versions are 3-terminal fixed voltage devices.
MIC29xx1 are fixed voltage devices with ENABLE and ERROR
flag. MIC29xx2 are adjustable regulators with ENABLE control.
MIC29xx3 are adjustables with an ERROR flag.
MIC29150/29300/29500/29750
2
March 2000
MIC29150/29300/29500/29750
Micrel
Absolute Maximum Ratings
Operating Ratings
Power Dissipation .................................... Internally Limited
Lead Temperature (Soldering, 5 seconds) ................ 260°C
Storage Temperature Range ................... –65°C to +150°C
Input Supply Voltage (Note 1) ....................... –20V to +60V
Operating Junction Temperature ............. –40°C to +125°C
Maximum Operating Input Voltage ............................... 26V
TO-220 θJC .............................................................. 2°C/W
TO-263 θJC .............................................................. 2°C/W
TO-247 θJC ........................................................... 1.5°C/W
Electrical Characteristics
All measurements at TJ = 25°C unless otherwise noted. Bold values are guaranteed across the operating temperature range.
Adjustable versions are programmed to 5.0V.
Parameter
Condition
Min
Output Voltage
IO = 10mA
10mA ≤ IO ≤ IFL, (VOUT + 1V) ≤ VIN ≤ 26V (Note 2)
Typ
Max
Units
–1
1
%
–2
2
%
Line Regulation
IO = 10mA, (VOUT + 1V) ≤ VIN ≤ 26V
0.06
0.5
%
Load Regulation
VIN = VOUT + 5V, 10mA ≤ IOUT ≤ IFULL LOAD (Note 2, 6)
0.2
1
%
∆VO
∆T
Dropout Voltage
Output Voltage (Note 6)
Temperature Coef.
∆VOUT = – 1%, (Note 3)
MIC29150
IO = 100mA
IO = 750mA
IO = 1.5A
MIC29300
IO = 100mA
IO = 1.5A
IO = 3A
MIC29500
IO = 250mA
IO = 2.5A
IO = 5A
MIC29750
IO = 250mA
IO = 4A
IO = 7.5A
20
100
ppm/°C
80
220
350
80
250
370
125
250
370
80
270
425
200
mV
8
22
10
37
15
70
35
120
20
mA
35
mA
50
mA
75
mA
Ground Current
MIC29150
MIC29300
MIC29500
MIC29750
IGNDDOGround Pin
Current at Dropout
Current Limit
en, Output Noise
Voltage
(10Hz to 100kHz)
IL = 100mA
Ground Current in Shutdown
March 2000
IO = 750mA, VIN = VOUT + 1V
IO = 1.5A
IO = 1.5A, VIN = VOUT + 1V
IO = 3A
IO = 2.5A, VIN = VOUT + 1V
IO = 5A
IO = 4A, VIN = VOUT + 1V
IO = 7.5A
VIN = 0.5V less than specified VOUT. IOUT = 10mA
MIC29150
MIC29300
MIC29500
MIC29750
MIC29150
VOUT = 0V (Note 4)
MIC29300
VOUT = 0V (Note 4)
MIC29500
VOUT = 0V (Note 4)
MIC29750
VOUT = 0V (Note 4)
CL = 10µF
0.9
1.7
2.1
3.1
2.1
4.5
7.5
9.5
400
CL = 33µF
260
MIC29150/1/2/3 only
VEN= 0.4V
3
2
600
175
600
250
600
200
600
3.5
5.0
10.0
15
10
30
mA
mA
mA
mA
A
A
A
A
µV (rms)
µA
µA
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Electrical Characteristics (Continued)
Reference
Parameter
MIC29xx2/MIC29xx3
Conditions
Reference Voltage
Reference Voltage
(Note 8)
Min
Typical
Max
Units
1.228
1.215
1.240
1.252
1.265
V
V max
1.277
V
80
120
nA
1.203
Adjust Pin
Bias Current
Reference Voltage
Temperature
Coefficient
40
(Note 7)
Adjust Pin Bias
Current Temperature
Coefficient
20
ppm/°C
0.1
nA/°C
Flag Output (Error Comparator) MIC29xx1/29xx3
Output Leakage
Current
VOH = 26V
0.01
1.00
2.00
µA
Output Low
Voltage
Device set for 5V. VIN = 4.5V
IOL = 250µA
220
300
400
mV
Upper Threshold
Voltage
Device set for 5V (Note 9)
Lower Threshold
Voltage
Device set for 5V (Note 9)
75
Hysteresis
Device set for 5V (Note 9)
15
ENABLE Input
40
25
95
140
mV
mV
V
0.8
2.4
VEN = 26V
100
VEN =0.8V
Regulator Output
Current in Shutdown
mV
MIC29xx1/MIC29xx2
Input Logic Voltage
Low (OFF)
High (ON)
Enable Pin
Input Current
60
(Note 10)
MIC29150/29300/29500/29750
600
750
µA
1
2
µA
µA
10
500
4
March 2000
MIC29150/29300/29500/29750
Micrel
Notes
Note 1:
Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle (≤1%). The maximum continuous supply
voltage is 26V.
Note 2:
Full Load current (IFL) is defined as 1.5A for the MIC29150, 3A for the MIC29300, 5A for the MIC29500, and 7.5A for the MIC29750 families.
Note 3:
Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with VOUT + 1V applied
to VIN
Note 4:
VIN = VOUT (nominal) + 1V. For example, use VIN = 4.3V for a 3.3V regulator or use 6V for a 5V regulator. Employ pulse-testing procedures to
minimize temperature rise.
Note 5:
Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground
pin current.
Note 6:
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 7:
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 = 20V (a 4W pulse) for T = 10ms.
Note 8:
VREF ≤ VOUT ≤ (VIN – 1 V), 2.3V ≤ VIN ≤ 26V, 10mA < IL ≤ IFL, TJ ≤ TJ MAX.
Note 9:
Comparator thresholds are expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured at
6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT /VREF = (R1 + R2)/R2. For
example, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95 mV x 5V/1.240 V = 384
mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal,
7.7% guaranteed.
Note 10: VEN ≤ 0.8V and VIN ≤ 26V, VOUT = 0.
Note 11: 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.
Block Diagram
IN
OUT
O.V.
ILIMIT
1.180V
FLAG
Reference
28V
1.240V
R1*
ADJ†
EN
Thermal
Shutdown
R2*
GND
* Feedback network in fixed versions only
Adjustable version only
†
Typical Applications
5V ± 5%
3.3V ± 1% @ 5A
MIC29500-3.3
47µF
VIN
VOUT
R1
R2
VOUT = 1.240V × [1 + (R1 / R2)]
Figure 1. Fixed output voltage.
March 2000
Figure 2. Adjustable output voltage configuration. For
best results, the total series resistance should be small
enough to pass the minimum regulator load current.
5
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Typical Characteristics MIC2915x
MIC2915x Dropout Voltage
vs. Temperature
400
0.7
350
300
250
200
150
100
50
0
0.0
0.5
1.0
OUTPUT CURRENT (A)
0.6
0.5
0.4
0.3
0.1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
1.5
15
10
5
0.4
0.8
1.2
OUTPUT CURRENT (A)
0.8
0.6
0.4
0.2
MIC2915x Ground Current
vs. Temperature
0.0
0
2
4
6
8
SUPPLY VOLTAGE (V)
50
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
2.0
1.5
1.0
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3.0
3.38
3.36
2.5
CURRENT (A)
3.32
3.30
3.28
3.26
3 DEVICES
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC29150/29300/29500/29750
40
30
20
10
2
4
6
8
SUPPLY VOLTAGE (V)
10
20
ILOAD = 1.5A
15
10
5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC2915x Ground Current
vs. Input Voltage
1.2
2.0
1.5
0
25
MIC29150-3.3 Short Circuit
Current vs. Temperature
MIC29150-3.3 Output
Voltage vs. Temperature
3.34
ILOAD = 250mA
0.5
3.40
MIC29152
IOUT = 1.5A
30
GROUND CURRENT (mA)
100
6
MIC2915x Ground Current
vs. Temperature
VOUT = 0V
1.0
0.5
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
6
GROUND CURRENT (µA)
ILOAD = 10mA
GROUND CURRENT (mA)
200
1
2
3
4
5
INPUT VOLTAGE (V)
50
0
10
2.5
250
0
MIC2915x Ground Current
vs. Supply Voltage
MIC2915x Ground Current
vs. Temperature
300
GROUND CURRENT (µA)
1.0
60
VOUT = 5V
ILOAD = 10mA
1.0
0.0
1.6
IOUT = 1.5A
2.0
GROUND CURRENT (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
20
IOUT = 10mA
3.0
1.2
0
0.0
OUTPUT VOLTAGE (V)
4.0
MIC2915x Ground Current
vs. Supply Voltage
25
3.24
3.22
ILOAD = 1.5A
0.2
MIC2915x Ground Current
vs. Output Current
150
MIC29150-5.0
Dropout Characteristics
5.0
OUTPUT VOLTAGE (V)
0.8
DROPOUT VOLTAGE (V)
DROPOUT VOLTAGE (mV)
MIC2915x Dropout Voltage
vs. Output Current
450
1.0
0.8
RLOAD = 100Ω
VOUT = 5V
0.6
0.4
0.2
0.0
-0.2
-30
-20 -10 0
10 20
INPUT VOLTAGE (V)
30
March 2000
MIC29150/29300/29500/29750
Micrel
MIC29151-xx/2 Enable Current
vs. Temperaure
VEN = 2V
5
0
-200
2.0
1.5
1.0
0.5
ILOAD = 10mA
0.0
-0.5
-5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0
MIC29152/3 Adjust Pin Current
vs. Temperature
∆ OUTPUT (mV)
40
30
20
10
5
10 15
TIME (ms)
20
25
200
ILOAD = 10mA
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
30
20
0
-100
-200
2.0
1.5
1.0
0.5
0.0
-0.5
-5
ILOAD = 10mA
0
5
10 15
TIME (ms)
20
25
MIC2915x
Line Transient
COUT = 10 µF
10
0
-10
10
-20
ILOAD = 10mA
8
COUT = 100 µF
100
MIC2915x
Line Transient
INPUT (V)
ADJUST PIN CURRENT (nA)
50
∆ OUTPUT (mV)
200
OUTPUT (A)
10
COUT = 10 µF
∆ OUTPUT (mV)
15
VEN = 5V
400
INPUT (V)
20
∆ OUTPUT (mV)
25
OUTPUT (A)
ENABLE CURRENT (µA)
30
MIC2915x
Load Transient
MIC2915x
Load Transient
6
4
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
10
5
COUT = 100 µF
0
10
-5
8
ILOAD = 10mA
6
4
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
MIC2915x Output Impedance
vs. Frequency
1
0.1
1x106
100x103
10x103
10x100
0.001
1x103
0.01
100x100
OUTPUT IMPEDANCE (Ω)
10
FREQUENCY (Hz)
March 2000
7
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Typical Characteristics MIC2930x
MIC2930x Dropout Voltage
vs. Temperature
0.35
0.7
0.30
0.25
0.20
0.15
0.10
0.05
0
1
2
OUTPUT CURRENT (A)
0.6
0.5
0.4
0.3
0.2
0.1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3
MIC2930x Ground Current
vs. Output Current
30
20
10
1.5
1.0
0.5
0.0
3
0.1
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
2
4
6
8
SUPPLY VOLTAGE (V)
25
0
10
1.0
0.5
7
CURRENT (A)
3.30
3.28
3 DEVICES
3.22
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC29150/29300/29500/29750
5
4
3
IOUT = 3A
40
30
20
10
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC2930x Ground Current
vs. Input Voltage
2.0
6
3.34
3.32
10
50
MIC29300-5.0 Short Circuit
Current vs. Temperature
3.38
3.36
2
4
6
8
SUPPLY VOLTAGE (V)
MIC2930x Ground Current
vs. Temperature
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
8
0
60
IOUT = 250mA
MIC29300-3.3 Output Voltage
vs. Temperature
OUTPUT VOLTAGE (V)
0
1.5
3.40
6
50
GROUND CURRENT (mA)
IOUT = 10mA
GROUND CURRENT (mA)
GROUND CURRENT (mA)
0.3
2
4
INPUT VOLTAGE (V)
FIXED 3.3V
IOUT = 3A
75
2.0
0.4
0
100
MIC2930x Ground Current
vs. Temperature
0.5
3.26
3.24
ILOAD = 3A
1.0
125
FIXED 3.3V DEVICE
RLOAD = 100Ω
MIC2930x Ground Current
vs. Temperature
0.2
2.0
MIC2930x Ground Current
vs. Supply Voltage
GROUND CURRENT (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
40
1
2
OUTPUT CURRENT (A)
ILOAD = 10mA
3.0
0.0
2.0
0
4.0
MIC2930x Ground Current
vs. Supply Voltage
50
0
ILOAD = 3A
VOUT = 0V
2
1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
8
GROUND CURRENT (mA)
0.00
MIC29300-3.3
Dropout Characteristics
5.0
OUTPUT VOLTAGE (V)
0.8
DROPOUT VOLTAGE (V)
DROPOUT VOLTAGE (V)
MIC2930x Dropout Voltage
vs. Output Current
0.40
1.5
1.0
0.5
0.0
RLOAD = 100Ω
-0.5
-30
-20 -10 0
10 20
INPUT VOLTAGE (V)
30
March 2000
MIC29150/29300/29500/29750
Micrel
MIC29301-x/2 Enable Current
vs. Temperaure
10
VEN = 2V
5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
COUT = 10 µF
400
200
0
-200
4
3
2
1
ILOAD = 10mA
0
-1
-5
MIC29302/3 Adjust Pin Current
vs. Temperature
30
ILOAD = 10mA
20
10
∆ OUTPUT (mV)
40
0
5
10 15
TIME (ms)
20
0
-50
-100
4
3
25
2
1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
COUT = 10 µF
0
-20
8.3
-40
ILOAD = 10mA
6.3
ILOAD = 10mA
0
-1
-5
0
5
10 15
TIME (ms)
20
25
MIC2930x
Line Transient
40
20
COUT = 100 µF
50
MIC2930x
Line Transient
INPUT (V)
ADJUST PIN CURRENT (nA)
50
OUTPUT (A) ∆ OUTPUT (mV)
15
VEN = 5V
MIC2930x
Load Transient
100
∆ OUTPUT (mV)
20
800
600
INPUT (V)
25
MIC2930x
Load Transient
OUTPUT (A) ∆ OUTPUT (mV)
ENABLE CURRENT (µA)
30
4.3
2.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
15
10
COUT = 100 µF
5
0
-5
8.3
-10
6.3
ILOAD = 10mA
4.3
2.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
MIC2930x Output Impedance
vs. Frequency
1
0.1
1x106
100x103
10x103
10x100
0.001
1x103
0.01
100x100
OUTPUT IMPEDANCE (Ω)
10
FREQUENCY (Hz)
March 2000
9
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Typical Characteristics MIC2950x
MIC2950x Dropout Voltage
vs. Temperature
400
0.7
350
300
250
200
150
100
50
0
1
2
3
4
OUTPUT CURRENT (A)
0.6
0.5
0.4
0.3
0.2
0.1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
5
MIC2950x Ground Current
vs. Output Current
50
40
30
20
10
6
2.0
1.5
1.0
0.5
0.0
2
4
6
8
SUPPLY VOLTAGE (V)
IOUT = 10mA
0.1
2
MIC29500-3.3 Output Voltage
vs. Temperature
0
9
8
3.34
3.32
7
6
CURRENT (A)
3.38
3.36
3.22
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0
1
2
3
4
SUPPLY VOLTAGE (V)
5
MIC2950x Ground Current
vs. Temperature
IOUT = 500mA
125
100
50
25
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
2.5
VOUT = 0V
5
4
3
2
1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
10
IOUT = 5A
75
MIC2950x-5.0 Short Circuit
Current vs. Temperature
10
3 DEVICES
FIXED 3.3V
VERSION
ILOAD = 5A
25
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3.40
3.30
3.28
50
150
3
1
6
75
10
GROUND CURRENT (mA)
0.2
GROUND CURRENT (mA)
GROUND CURRENT (mA)
0.3
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
0
4
0.4
2
4
INPUT VOLTAGE (V)
100
MIC2950x Ground Current
vs. Temperature
0.5
MIC29150/29300/29500/29750
0
125
FIXED 3.3V VERSIONS
RLOAD = 100Ω
2.5
MIC2950x Ground Current
vs. Temperature
3.26
3.24
1.0
MIC2950x Ground Current
vs. Supply Voltage
GROUND CURRENT (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
60
1
2
3
4
5
OUTPUT CURRENT (A)
ILOAD = 5A
2.0
0.0
3.0
70
0
ILOAD = 10mA
3.0
MIC2950x Ground Current
vs. Supply Voltage
80
0
ILOAD = 5A
4.0
GROUND CURRENT (mA)
0
MIC29500-3.3
Dropout Characteristics
5.0
OUTPUT VOLTAGE (V)
0.8
DROPOUT VOLTAGE (V)
DROPOUT VOLTAGE (V)
MIC2950x Dropout Voltage
vs. Output Current
450
MIC2950x Ground Current
vs. Input Voltage
2.0
1.5
1.0
0.5
0.0
RLOAD = 100Ω
-0.5
-30
-20 -10
0
10 20
INPUT VOLTAGE (V)
30
March 2000
MIC29150/29300/29500/29750
Micrel
MIC29501-xx/2 Enable Current
vs. Temperaure
VEN = 2V
5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0
-500
6
5
4
3
2
1
0
-1
-5
MIC29502/3 Adjust Pin Current
vs. Temperature
∆ OUTPUT (mV)
70
60
50
40
30
20
10
ILOAD = 10mA
ILOAD = 10mA
0
5
10 15
TIME (ms)
20
25
0
-50
-100
6
5
4
3
2
1
0
-1
-5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
COUT = 10 µF
0
-50
8.2
-100
ILOAD = 10mA
6.2
ILOAD = 10mA
0
5
10 15
TIME (ms)
20
25
MIC2950x
Line Transient
100
50
COUT = 100 µF
50
MIC2950x
Line Transient
INPUT (V)
ADJUST PIN CURRENT (nA)
80
∆ OUTPUT (mV)
500
OUTPUT (A)
10
VEN = 5V
COUT = 10 µF
1000
∆ OUTPUT (mV)
15
MIC2950x
Load Transient
100
INPUT (V)
20
∆ OUTPUT (mV)
25
MIC2950x
Load Transient
1500
OUTPUT (A)
ENABLE CURRENT (µA)
30
4.2
2.2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
20
10
COUT = 100 µF
0
-10
8.2
-20
6.2
ILOAD = 10mA
4.2
2.2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
MIC2950x Output Impedance
vs. Frequency
1
0.1
1x106
100x103
10x103
10x100
0.001
1x103
0.01
100x100
OUTPUT IMPEDANCE (Ω)
10
FREQUENCY (Hz)
March 2000
11
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Typical Characteristics MIC2975x
MIC2975x Dropout Voltage
vs. Output Current
MIC2975x Dropout Voltage
vs. Temperature
350
300
250
200
150
100
50
0
1 2 3 4 5 6 7
OUTPUT CURRENT (A)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
8
MIC2975x Ground Current
vs. Output Current
80
60
40
20
1 2 3 4 5 6 7
OUTPUT CURRENT (A)
8
2.5
2.0
1.5
1.0
0.5
MIC2975x Ground Current
vs. Temperature
0.1
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC29750-3.3 Output Voltage
vs. Temperature
CURRENT (A)
3.34
3.32
3.30
3.28
3 DEVICES
3.22
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC29150/29300/29500/29750
6
100
75
50
FIXED 3.3V VERSION
ILOAD = 7.5A
25
0
2
4
6
SUPPLY VOLTAGE (V)
8
MIC2975x Ground Current
vs. Temperature
200
3
2
IOUT = 250mA
1
12
11
10
9
VOUT = 0V
8
7
6
5
4
3
2
1
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
12
150
IOUT = 7.5A
100
50
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC29750-5.0 Short Circuit
Current vs. Temperature
3.38
3.36
2
4
INPUT VOLTAGE (V)
125
0
10
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3.40
OUTPUT VOLTAGE (V)
2
4
6
8
SUPPLY VOLTAGE (V)
GROUND CURRENT (mA)
IOUT = 10mA
GROUND CURRENT (mA)
GROUND CURRENT (mA)
0.3
3.26
3.24
0
4
0.4
0
150
MIC2975x Ground Current
vs. Temperature
0.5
0.2
1.0
175
FIXED 3.3V
VERSION
IOUT = 10mA
3.0
0.0
ILOAD = 7.5A
2.0
MIC2975x Ground Current
vs. Supply Voltage
GROUND CURRENT (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
100
ILOAD = 10mA
3.0
0.0
3.5
0
4.0
MIC2975x Ground Current
vs. Supply Voltage
120
0
5.0
3.5
GROUND CURRENT (mA)
0
MIC29750-3.3
Dropout Characteristics
1.0
0.9
OUTPUT VOLTAGE (V)
400
DROPOUT VOLTAGE (V)
DROPOUT VOLTAGE (mV)
450
MIC2975x Ground Current
vs. Input Voltage
3.0
2.5
2.0
1.5
1.0 RLOAD = 100Ω
0.5
0.0
-0.5
-30
-20 -10 0
10 20
INPUT VOLTAGE (V)
30
March 2000
MIC29150/29300/29500/29750
Micrel
MIC29751-xx/2 Enable Current
vs. Temperaure
VEN = 2V
5
0
-500
10.0
7.5
5.0
2.5
ILOAD = 10mA
0.0
-2.5
-5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC29752/3 Adjust Pin Current
vs. Temperature
∆ OUTPUT (mV)
70
60
50
40
30
20
10
ILOAD = 10mA
0
5
10 15
TIME (ms)
20
0
-100
-200
10.0
7.5
25
5.0
2.5
0.0
-2.5
-5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
COUT = 10 µF
0
-50
8.3
-100
ILOAD = 10mA
6.3
ILOAD = 10mA
0
5
10 15
TIME (ms)
20
25
MIC2975x
Line Transient
100
50
COUT = 100 µF
100
MIC2975x
Line Transient
INPUT (V)
ADJUST PIN CURRENT (nA)
80
∆ OUTPUT (mV)
500
OUTPUT (A)
10
COUT = 10 µF
1000
∆ OUTPUT (mV)
15
VEN = 5V
MIC2975x
Load Transient
300
200
INPUT (V)
20
∆ OUTPUT (mV)
25
MIC2975x
Load Transient
1500
OUTPUT (A)
ENABLE CURRENT (µA)
30
4.3
2.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
30
20
COUT = 100 µF
10
0
-10
8.3
-20
6.3
ILOAD = 10mA
4.3
2.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
TIME (ms)
MIC2975x Output Impedance
vs. Frequency
1
0.1
1x106
100x103
10x103
10x100
0.001
1x103
0.01
100x100
OUTPUT IMPEDANCE (Ω)
10
FREQUENCY (Hz)
March 2000
13
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
First, we calculate the power dissipation of the regulator from
these numbers and the device parameters from this datasheet.
Applications Information
The MIC29150/29300/29500/29750 are high performance
low-dropout voltage regulators suitable for all moderate to
high-current voltage regulator applications. Their 300mV to
400mV dropout voltage at full load make them 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-emitter voltage drop and
collector-emitter saturation voltage, dropout performance of
the PNP output of these devices is limited merely by the low
VCE saturation voltage.
A trade-off for the low dropout voltage is a varying base drive
requirement. But Micrel’s Super ßeta PNP™ process reduces this drive requirement to merely 1% of the load current.
The MIC29150–29750 family of regulators is fully protected
from damage due to fault conditions. Current limiting is
provided. This limiting is linear; output current under overload
conditions is constant. Thermal shutdown disables the device when the die temperature exceeds the 125°C maximum
safe operating temperature. Transient protection allows device (and load) survival even when the input voltage spikes
between –20V and +60V. When the input voltage exceeds
about 35V to 40V, the overvoltage sensor temporarily disables the regulator. The output structure of these regulators
allows voltages in excess of the desired output voltage to be
applied without reverse current flow. MIC29xx1 and MIC29xx2
versions offer a logic level ON/OFF control: when disabled,
the devices draw nearly zero current.
An additional feature of this regulator family is a common
pinout: a design’s current requirement may change up or
down yet use the same board layout, as all of these regulators
have identical pinouts.
VIN
OUT
IN
(
PD = IOUT 1.01VIN − VOUT
Where the ground current is approximated by 1% of IOUT.
Then the heat sink thermal resistance is determined with this
formula:
T
− TA
θSA = J MAX
− θ JC + 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 distribute the heat
between this resistor and the regulator. The low dropout
properties of Micrel Super ßeta PNP regulators allow very
significant reductions in regulator power dissipation and the
associated heat sink without compromising performance.
When this technique is employed, a capacitor of at least
0.1µF is needed directly between the input and regulator
ground.
Please refer to Application Note 9 and Application Hint 17 for
further details and examples on thermal design and heat sink
specification.
Capacitor Requirements
For stability and minimum output noise, a capacitor on the
regulator output is necessary. The value of this capacitor is
dependent upon the output current; lower currents allow
smaller capacitors. MIC29150—29750 regulators are stable
with the following minimum capacitor values at full load:
Device
Full Load Capacitor
MIC29150 .............................. 10µF
MIC29300 .............................. 10µF
MIC29500 .............................. 10µF
MIC29750 .............................. 22µF
This capacitor need not be an expensive low ESR type:
aluminum electrolytics are adequate. In fact, extremely low
ESR capacitors may contribute to instability. Tantalum capacitors are recommended for systems where fast load
transient response is important.
Where the regulator is powered from a source with a high AC
impedance, a 0.1µF capacitor connected between Input and
GND is recommended. This capacitor should have good
characteristics to above 250kHz.
Minimum Load Current
The MIC29150–29750 regulators are specified between finite loads. If the output current is too small, leakage currents
dominate and the output voltage rises. The following minimum load current swamps any expected leakage current
across the operating temperature range:
VOUT
GND
Figure 3. Linear regulators require only two capacitors
for operation.
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:
• Maximum ambient temperature, TA
• Output Current, IOUT
• Output Voltage, VOUT
• Input Voltage, VIN
MIC29150/29300/29500/29750
)
14
March 2000
MIC29150/29300/29500/29750
Micrel
Device
Two resistors are used. Resistors can be quite large, up to
1MΩ, because of the very high input impedance and low bias
current of the sense comparator: The resistor values are
calculated by:
Minimum Load
MIC29150 .................................................... 5mA
MIC29300 .................................................... 7mA
MIC29500 .................................................. 10mA
MIC29750 .................................................. 10mA
V

R1 = R 2  OUT − 1
 1.240 
Adjustable Regulator Design
Where VO is the desired output voltage. Figure 4 shows
component definition. Applications with widely varying load
currents may scale the resistors to draw the minimum load
current required for proper operation (see above).
Error Flag
MIC29xx1 and MIC29xx3 versions feature an Error Flag,
which looks at the output voltage and signals an error
condition when this voltage drops 5% below its expected
value. The error flag is an open-collector output that pulls low
under fault conditions. It may sink 10mA. Low output voltage
signifies a number of possible problems, including an overcurrent fault (the device is in current limit) and low input
voltage. The flag output is inoperative during overtemperature shutdown conditions.
Enable Input
MIC29xx1 and MIC29xx2 versions feature an enable (EN)
input that allows ON/OFF control of the device. Special
design allows “zero” current drain when the device is disabled—only microamperes of leakage current flows. The EN
input has TTL/CMOS compatible thresholds for simple interfacing with logic, or may be directly tied to ≤ 30V. Enabling the
regulator requires approximately 20µA of current.
MIC29152BT
VIN
VOUT
R1
10µF
22µF
R2
VOUT = 1.235V × [1 + (R1 / R2)]
Figure 4. Adjustable Regulator with Resistors
The adjustable regulator versions, MIC29xx2 and MIC29xx3,
allow programming the output voltage anywhere between
1.25V and the 26V maximum operating rating of the family.
March 2000
15
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
Package Information
0.151 D ±0.005
(3.84 D ±0.13)
0.410 ±0.010
(10.41 ±0.25)
0.108 ±0.005
(2.74 ±0.13)
0.176 ±0.005
(4.47 ±0.13)
0.590 ±0.005
(14.99 ±0.13)
0.818 ±0.005
(20.78 ±0.13)
0.050 ±0.005
(1.27 ±0.13)
7°
0.356 ±0.005
(9.04 ±0.13)
7°
3°
1.140 ±0.010
(28.96 ±0.25)
0.050 ±0.003
(1.27 ±.08)
0.030 ±0.003
(0.76 ±0.08)
0.018 ±0.008
(0.46 ±0.020)
0.100 ±0.005
(2.54 ±0.13)
0.100 ±0.020
(2.54 ±0.51)
DIMENSIONS: INCH
(MM)
3-Lead TO-220 (T)
0.176 ±0.005
0.405±0.005
0.065 ±0.010
20°±2°
0.050 ±0.005
0.050±0.005
0.360±0.005
0.600±0.025
SEATING PLANE
0.004 +0.004
–0.008
0.100 BSC
8° MAX
0.050
0.100 ±0.01
0.015 ±0.002
DIM. = INCH
3-Lead TO-263 (U)
MIC29150/29300/29500/29750
16
March 2000
MIC29150/29300/29500/29750
MOUNTING HOLE
0.125
(3.175)
DIA TYP
Micrel
0.190 – 0.210
(4.826 – 5.334)
0.620 – 0.640
(15.748 – 16.256)
0.180 – 0.200
(4.572 – 5.080)
15° TYP
15° TYP
0.160 – 0.180
(4.064 – 4.572)
0.860 – 0.880
(21.844 – 22.352)
Dimensions:
inch
(mm)
7° TYP
0.250
(6.350)
MAX
0.780 – 0.820
(19.812 – 20.828)
0.040 – 0.060
(1.016 – 1.524)
0.070 – 0.090
(1.778 – 2.286)
0.110 – 0.130
(2.794 – 3.302)
0.070 – 0.090
(1.778 – 2.286)
0.025 – 0.035
(0.635 – 0.889)
0.200
(5.080)
BSC
3-Lead TO-247 (WT)
March 2000
17
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
0.150 D ±0.005
(3.81 D ±0.13)
0.177 ±0.008
(4.50 ±0.20)
0.400 ±0.015
(10.16 ±0.38)
0.050 ±0.005
(1.27 ±0.13)
0.108 ±0.005
(2.74 ±0.13)
0.241 ±0.017
(6.12 ±0.43)
0.578 ±0.018
(14.68 ±0.46)
SEATING
PLANE
7°
Typ.
0.550 ±0.010
(13.97 ±0.25)
0.067 ±0.005
(1.70 ±0.127)
0.032 ±0.005
(0.81 ±0.13)
0.268 REF
(6.81 REF)
0.018 ±0.008
(0.46 ±0.20)
0.103 ±0.013
(2.62±0.33)
Dimensions: inch
(mm)
5-Lead TO-220 (T)
0.176 ±0.005
0.405±0.005
0.065 ±0.010
20°±2°
0.060 ±0.005
0.050±0.005
0.360±0.005
0.600±0.025
SEATING PLANE
0.004 +0.004
–0.008
0.067±0.005
8° MAX
0.032 ±0.003
0.100 ±0.01
0.015 ±0.002
DIM. = INCH
5-Lead TO-263 (U)
MIC29150/29300/29500/29750
18
March 2000
MIC29150/29300/29500/29750
Micrel
MOUNTING HOLE
0.140 – 0.143
(3.56 – 3.63)
DIA TYP
0.185 – 0.208
(4.70 – 5.28)
0.620 – 0.640
(15.75 – 16.26)
0.180 – 0.200
(4.57 – 5.08)
0.242 BSC
(6.15 BSC)
0.819 – 0.844
(20.80 – 21.44)
0.170 – 0.216
(4.32 – 5.49)
Dimensions:
inch
(mm)
0.780 – 0.800
(19.81 – 20.32)
0.040 – 0.055
(1.02 – 1.40)
0.100 BSC
(2.54 BSC)
0.080 – 0.100
(2.03 – 2.54)
0.016 – 0.031
(0.41 – 0.79)
5-Lead TO-247 (WT)
March 2000
19
MIC29150/29300/29500/29750
MIC29150/29300/29500/29750
Micrel
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
USA
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March 2000