HTC LM29152R 1.5a very l.d.o voltage regulator Datasheet

1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
FEATURES
SOT-223 PKG
z Fixed and adjustable output voltages to 1.24V
z 410mV typical dropout at 1A
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V or 1.5V conversion
z 1A minimum guaranteed output current
z 1% initial accuracy
z Low ground current
z Current limiting and thermal shutdown
z Reversed-battery protection
z Reversed-leakage protection
z Fast transient response
z Low-profile SOT-223 package
z Moisture Sensitivity Level 3
TO-252 3L / 5L PKG
SOP-8 PKG
ORDERING INFORMATION
Device
LM39100S-X.X
LM39100GS-X.X
LM39100RS-X.X
LM39100GRS-X.X
LM39101RS-X.X
LM39101GRS-X.X
LM39102RS
LM39102GRS
LM39101D-X.X
LM39102D
APPLICATION
z
z
z
z
z
z
Battery Powered Equipments
Motherboards and Graphic Cards
Microprocessor Power Supplies
Peripheral Cards
High Efficiency Linear Regulators
Battery Chargers
DESCRIPSION
Package
SOT-223
TO-252 3L
TO-252 5L
SOP-8
X.X = Output Voltage = 1.5, 1.8, 2.5, 3.3, 5.0
The LM39100/1/2 is 1A low-dropout linear voltage
regulators that provide low-voltage, high-current output.
The LM39100/1/2 offers extremely low dropout (typically 410mV at 1A) and low ground current (typically 12mA
at 1A). The LM39100 is a fixed output regulator offered in the SOT-223 package. The LM39101 and LM39102
are fixed and adjustable regulators, respectively, in SOP-8 and TO-252 Packages.
The LM39100/1/2 is ideal for PC add-in cards that need to convert from standard 5V to 3.3V, 3.3V to 2.5V or
2.5V to1.8V. A guaranteed maximum dropout voltage of 630mV overall operating conditions allows the
LM39100/1/2 to provide2.5V from a supply as low as 3.13V and 1.8V from a supply as low as 2.43V. The
LM39100/1/2 is fully protected with over current limiting, thermal shutdown, and reversed-battery protection.
Fixed voltages of 5.0V, 3.3V, 2.5V, 1.8V and 1.5V are available on LM39100/1 with adjustable output voltages
to 1.24V on LM39102.
Absolute Maximum Ratings (Note 1)
CHARACTERISTIC
SYMBOL
MIN.
MAX.
UNIT
Supply Voltage
VIN
- 0.3
+ 20
V
Enable Voltage
VEN
-
+ 20
V
Output Voltage
VOUT
-0.3
VIN +0.3
V
Lead Temperature (Soldering, 5 sec)
TSOL
-
260
℃
Storage Temperature Range
TSTG
-65
+ 150
℃
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
Operating Ratings (Note 2)
CHARACTERISTIC
SYMBOL
MIN.
MAX.
UNIT
Supply Voltage
VIN
+ 2.25
+ 16
V
Enable Voltage
VEN
+ 2.25
+ 16
V
PD(max)
(Note 3)
(Note 3)
TJ
-40
+ 125
Maximum Power Dissipation
Junction Temperature
Package Thermal Resistance
℃
θJA-SOT-223
115
℃/W
θJA-TO252
95
℃/W
θJA-SOP-8
130
℃/W
Ordering Information
VOUT
1.5 V
1.8 V
2.5 V
3.3 V
Package
Order No.
Description
Supplied As
Status
SOT-223
LM39100S-1.5V
1A, Fixed
Reel
Active
SOT-223
LM39100GS-1.5V
1A, Fixed
Reel
Contact us
TO-252 3L
LM39100RS-1.5V
1A, Fixed
Reel
Active
TO-252 3L
LM39100GRS-1.5V
1A, Fixed
Reel
Active
TO-252 5L
LM39101RS-1.5V
1A, Fixed, Enable
Reel
Active
TO-252 5L
LM39101GRS-1.5V
1A, Fixed, Enable
Reel
Active
SOP-8
LM39101D-1.5V
1A, Fixed, Enable
Reel
Active
SOT-223
LM39100S-1.8V
1A, Fixed
Reel
Active
SOT-223
LM39100GS-1.8V
1A, Fixed
Reel
Contact us
TO-252 3L
LM39100RS-1.8V
1A, Fixed
Reel
Active
TO-252 3L
LM39100GRS-1.8V
1A, Fixed
Reel
Active
TO-252 5L
LM39101RS-1.8V
1A, Fixed, Enable
Reel
Active
TO-252 5L
LM39101GRS-1.8V
1A, Fixed, Enable
Reel
Active
SOP-8
LM39101D-1.8V
1A, Fixed, Enable
Reel
Active
SOT-223
LM39100S-2.5V
1A, Fixed
Reel
Active
SOT-223
LM39100GS-2.5V
1A, Fixed
Reel
Contact us
TO-252 3L
LM39100RS-2.5V
1A, Fixed
Reel
Active
TO-252 3L
LM39100GRS-2.5V
1A, Fixed
Reel
Active
TO-252 5L
LM39101RS-2.5V
1A, Fixed, Enable
Reel
Active
TO-252 5L
LM39101GRS-2.5V
1A, Fixed, Enable
Reel
Active
SOP-8
LM39101D-2.5V
1A, Fixed, Enable
Reel
Active
SOT-223
LM39100S-3.3V
1A, Fixed
Reel
Active
SOT-223
LM39100GS-3.3V
1A, Fixed
Reel
Contact us
TO-252 3L
LM39100RS-3.3V
1A, Fixed
Reel
Active
TO-252 3L
LM39100GRS-3.3V
1A, Fixed
Reel
Active
TO-252 5L
LM39101RS-3.3V
1A, Fixed, Enable
Reel
Active
TO-252 5L
LM39101GRS-3.3V
1A, Fixed, Enable
Reel
Active
SOP-8
LM39101D-3.3V
1A, Fixed, Enable
Reel
Active
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
Ordering Information
VOUT
5.0 V
ADJ
Package
Order No.
Description
Supplied As
Status
SOT-223
LM39100S-5.0V
1A, Fixed
Reel
Active
SOT-223
LM39100GS-5.0V
1A, Fixed
Reel
Contact us
TO-252 3L
LM39100RS-5.0V
1A, Fixed
Reel
Active
TO-252 3L
LM39100GRS-5.0V
1A, Fixed
Reel
Active
TO-252 5L
LM39101RS-5.0V
1A, Fixed, Enable
Reel
Active
TO-252 5L
LM39101GRS-5.0V
1A, Fixed, Enable
Reel
Active
SOP-8
LM39101D-5.0V
1A, Fixed, Enable
Reel
Active
TO-252 5L
LM39102RS
1A, Adjustable, Enable
Reel
Active
TO-252 5L
LM39102GRS
1A, Adjustable, Enable
Reel
Active
SOP-8
LM39102D
1A, Adjustable, Enable
Reel
Active
LM 3910X
Output Voltage : 1.5V / 1.8V / 2.5V / 3.3V / 5.0V / Blank(ADJ Only)
S : SOT-223
RS : TO-252
D : SOP-8
Package Type
Green Mode
G
: Halogen Free
Blank : Pb Free
Root Name
39100 : 3L Fixed Output
39101 : 5L Fixed Output
39102 : 5L / 8L Adjustable Output
Product Code
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
PIN CONFIGURATION
EN
1
8
GND
VIN
2
7
GND
VOUT
3
6
GND
FLG/ADJ 4
5
GND
SOP-8
VOUT
3
2
GND (TAB)
2
GND (TAB)
1
VIN
1
VIN
SOT-223
5
FLG/ADJ
4
VOUT
3
GND (TAB)
2
VIN
1
EN
VOUT
3
TO-252 3L
TO-252 5L
PIN DESCRIPTION
SOT-223 & TO-252 3L (for 39100)
Pin No.
Name
Function
1
VIN
Input Supply
2
GND
Ground
3
VOUT
Output Voltage
TO-252 5L (for 39101/2)
SOP-8 (for 39101/2)
Pin No.
Name
Function
Name
Function
1
EN
Chip Enable
EN
Chip Enable
2
VIN
Input Supply
VIN
Input Supply
3
GND
Ground
VOUT
Output Voltage
4
VOUT
Output Voltage
FLG / ADJ
Error Flag Output
or Output Adjust
5
FLG / ADJ
Error Flag Output
or Output Adjust
GND
Ground
6/7/8
-
-
GND
Ground
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
TYPICAL APPLICATION
100k
Error Flag
Output
LM39100
3.3V
IN
LM39101
2.5V
OUT
3.3V
GND
IN
Enable
Shutdown
2.5V / 1A Regulator
EN
OUT
GND
2.5V
FLG
2.5V / 1A Regulator with Error Flag
LM39102
2.5V
Enable
Shutdown
IN
EN
1.5V
OUT
GND
ADJ
R1
R2
1.5V / 1A Adjustable Regulator
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
ELECTRICAL CHARACTERISTICS
VIN= VOUT +1V; VEN = 2.25V; TJ = 25°C, bold values indicate -40°C ≤ TJ ≤ +125°C; unless noted
Symbol
VOUT
ΔVOUT/ΔT
Parameters
Condition
Min.
IOUT(lim)
Unit
1
2
%
%
10mA
10mA ≤ IOUT ≤ 1A, VOUT+1V ≤ VIN ≤8V
Line Regulation
IOUT=10mA, VOUT +1V ≤ VIN ≤ 16V
0.06
0.5
%
Load Regulation
VIN= VOUT +1V, 10mA ≤ IOUT ≤ 1A
0.2
1
%
40
100
ppm/ °C
150
200
250
mV
mV
-1
-2
Output Voltage Temp.
Coefficient (Note 4)
Dropout Voltage (Note 5)
IOUT=500mA, ΔVOUT = -1%
275
IOUT=750mA, ΔVOUT = -1%
330
500
mV
410
550
630
mV
mV
IOUT=1A, ΔVOUT = -1%
IGND
Max.
Output Voltage
IOUT=100mA, ΔVOUT = -1%
VDO
Typ.
Ground Current (Note 6)
Current Limit
mV
IOUT=100mA, VIN= VOUT+1V
700
μA
IOUT=500mA, VIN= VOUT+1V
4
mA
IOUT=750mA, VIN= VOUT+1V
7
mA
VOUT=0V, VIN=VOUT+1V
1.8
2.5
A
0.8
V
Enable Input
VEN
Enable Input Voltage
logic low (off)
logic high (on)
2.25
1
15
30
75
2
4
IOUT =10mA, VIN =VOUT +1V,
VEN =0V to VIN
50
500
IOUT =500mA, VIN =VOUT +1V,
VEN =0V to VIN
250
2000
IOUT =1.0A, VIN =VOUT +1V,
VEN =0V to VIN
350
3000
0.01
1
2
300
400
VEN=2.25V
IEN
V
Enable Input Current
VEN=0.8V
TEN
Delay time to
Nominal Output Voltage
(Note 7)
μA
μA
μA
μA
μs
Flag Output
IFLG (leak)
VFLG (do)
VFLG
Output Leakage
Current
Output Low Voltage
VOH=16V
(Note 8)
VIN=0.9.VOUT NOMINAL, IOL=250μA
Low Threshold
% of VOUT
High Threshold
% of VOUT
93
%
99.2
Hysteresis
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240
1
-6
-
μA
μA
mV
mV
%
%
HTC
1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
LM39102 Only
1.228
1.215
Reference Voltage
(Note 9)
1.24
1.203
40
Adjust Pin Bias
Current
Reference Voltage
Temp. Coefficient (Note 4)
20
Adjust Pin Bias Current
Temp. Coefficient
0.1
1.252
1.265
V
V
1.277
V
80
120
nA
nA
ppm/ °C
99.2
nA/ °C
Note 1. Exceeding the absolute maximum ratings may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. PD (max)= (TJ (max) - TA) ÷ θJA, where θJA -junction-to-ambient thermal resistance.
Note 4. Output voltage temperature coefficient is ΔVOUT (worst case) ÷ (TJ(max) - TJ(min)) where TJ(max) is +125°C and TJ(min) is 0°C.
Note 5. VDO = VIN - VOUT when VOUT decreases to 99% 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.
Note 6. IGND is the quiescent current. IIN = IGND + IOUT.
Note 7. Delay time is measured after VEN=VIN.
CIN=COUT=10μF.
Note 8. For adjustable device and fixed device with VOUT ≥ 2.5V
Note 9. VREF ≤ VOUT ≤ (VIN - 1V), 2.25V ≤ VIN ≤ 16V, 10mA ≤ IL ≤ 1 A.
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
TYPICAL OPERATING CHARACTERISTICS
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
TYPICAL OPERATING CHARACTERISTICS
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
APPLICATION INFORMATION
The LM39100/1/2 is a high-performance low-dropout voltage regulator suitable for moderate to high-current
voltage regulator applications. Its 630mV dropout voltage at full load and over temperature makes it especially
valuable in battery-powered systems and as high-efficiency noise filters in post-regulator applications. Unlike
older NPN-pass transistor de-signs, 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. A trade-off for the low dropout voltage is a varying
base drive requirement.
The LM39100/1/2 regulator is fully protected from damage due to fault conditions. Linear current limiting is
provided. 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.
Output Capacitor
The LM39100/1/2 requires an output capacitor to maintain stability and improve transient response. Proper
capacitor selection is important to ensure proper operation. The LM39100/1/2 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 promote stability. Ultra-low-ESR capacitors, such as ceramic chip
capacitors, may promote instability or may cause an oscillation and/or under damped transient response. In
this case, minimum 20uF of output capacitance is required. A low-ESR solid tantalum capacitor works
extremely well and provides good transient response and stability over temperature. Aluminum electrolytic
capacitor can also be used, as long as the ESR of the capacitor is <2Ω. 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.
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. In the case of ceramic chip capacitor, 10uF
capacitance is recommended. Larger values will help to improve ripple rejection by bypassing the input to
the regulator, further improving the integrity of the output voltage.
Error Flag
The LM39101 features an error flag (FLG), which monitors 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 and may sink up to 10mA. Low output voltage signifies a number of possible problems,
including an over current fault (the device is in current limit) or low input voltage. The flag output is inoperative
during over temperature conditions. A pull-up resistor from FLG to either VIN or VOUT is required for proper
operation. For information regarding the minimum and maximum values of pull-up resistance, refer to the
graph in the typical characteristics section of the data sheet.
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
Enable Input
The LM39101 and LM39102 versions feature an active-high enable input (EN) that allows on-off control of the
regulator. Current drain reduces to “zero” when the device is shutdown, with only micro amperes of leakage
current. The EN input has TTL/CMOS compatible thresholds for simple logic interfacing. EN may be directly
tied to VIN and pulled up to the maximum supply voltage
Transient Response and 3.3V to 2.5V or 2.5V to 1.8V Conversion
The LM39100/1/2 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 NPNbased de-signs. 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 or 1.8V
without operating in dropout, NPN-based regulators require an input voltage of 3.7V at the very least. The
LM39100 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.
Minimum Load Current
The LM39100/1/2 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.
Adjustable Regulator Design
The LM39102 allows programming the output voltage any-where between 1.24V and the 16V maximum
operating rating of the family. 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 : R1=R2(Vout/1.240-1) Where Vout is the desired output voltage. Figure 1 shows component definition.
Applications with widely varying load currents may scale the resistors to draw the minimum load current
required for proper operation (see below). The current consumed by feedback resisters R1 and R2 is
calculated by: Ires = Vout / (R1+ R2).
LM39102
VIN
Enable
Shutdown
IN
EN
VOUT
OUT
GND
ADJ
R1
R2
C OUT
Figure 1. Adjustable Regulator with Resistors
Maximum Output Current Capability
The LM39100/1/2 can deliver a continuous current of 1A over the full operating junction temperature range.
However, the output current is limited by the restriction of power dissipation which differs from packages. A
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1A Low-Voltage Low-Dropout Regulator
LM39100/39101/39102
heat sink may be required depending on the maximum power dissipation and maximum ambient temperature
of application. With respect to the applied package, the maximum output current of 1A may be still
undeliverable due to the restriction of the power dissipation of LM39100/1/2. Under all possible conditions, the
junction temperature must be within the range specified under operating conditions. The temperatures over
the device are given by:
TC = TA + PD X θCA / TJ = TC + PD X θJC / TJ = TA + PD X θJA
Where TJ is the junction temperature, TC is the case temperature, TA is the ambient temperature, PD is the total
power dissipation of the device, θCA is the thermal resistance of case-to-ambient, θJC is the thermal resistance
of junction-to-case, and θJA is the thermal resistance of junction to ambient. The total power dissipation of the
device is given by:
PD = PIN – POUT = (VIN X IIN)–(VOUT X IOUT)
= (VIN X (IOUT+IGND)) – (VOUT X IOUT) = (VIN - VOUT) X IOUT + VIN X IGND
Where IGND is the operating ground current of the device which is specified at the Electrical Characteristics.
The maximum allowable temperature rise (TRmax) depends on the maximum ambient temperature (TAmax) of
the application, and the maximum allowable junction temperature (TJmax):
TRmax = TJmax – TAmax
The maximum allowable value for junction-to-ambient thermal resistance, θJA, can be calculated using the
formula:
θJA = TRmax / PD = (TJmax – TAmax) / PD
LM39100/1/2 is available in SOT-223, TO-252, and SOP-8 package. The thermal resistance depends on
amount of copper area or heat sink, and on air flow. If the maximum allowable value of θJA calculated above is
over 115°C/W for SOT-223 package, 95°C/W for TO-252 package, 130°C/W for SOP-8 package, no heat sink
is needed since the package can dissipate enough heat to satisfy these requirements. If the value for
allowable θJA falls near or below these limits, a heat sink or proper area of copper plane is required. In
summary, the absolute maximum ratings of thermal resistances are as follow:
Absolute Maximum Ratings of Thermal Resistance
Characteristic
Symbol
Rating
Unit
Thermal Resistance Junction-To-Ambient / SOT-223
θJA-SOT-223
115
°C/W
Thermal Resistance Junction-To-Ambient / TO-252
θJA-TO-252
95
°C/W
θJA-SOP-8
130
°C/W
Thermal Resistance Junction-To-Ambient / SOP-8
2
No heat sink / No air flow / No adjacent heat source / 20 mm copper area. (TA=25°C)
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1A Low-Voltage Low-Dropout Regulator
Thermal Resistance(ΘJA)
vs. Copper Area (SOP-8)
Power Disspation(Pd)
vs. Copper Area (SOP-8)
@ TJ=125℃
1.4
Power disspation, Pd (W)
140
Thermal Resistance, ΘJA(℃/W)
1.6
LM39100/39101/39102
1.2
1
0.8
0.6
120
100
80
60
40
0.4
10
100
2
10
1000
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100
1000
Copper Area (mm2)
Copper Area (mm )
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