TS39302 [TSC]
3A Ultra Low Dropout Positive Voltage Regulator; 3A超低压差正电压稳压器
| 型号： | TS39302 |
| 厂家： | 
TAIWAN SEMICONDUCTOR COMPANY, LTD |
| 描述： | 3A Ultra Low Dropout Positive Voltage Regulator |
| 文件： | 总7页 (文件大小：272K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS39301/2/3/4
3A Ultra Low Dropout Positive Voltage Regulator
Low Dropout Voltage 0.4V (typ.)
Output Current 3A
Low Quiescent Current
General Description
The TS39301/2/3/4 are 3A ultra low dropout linear voltage regulators that provide low voltage, high current output with
a minimum of external components. The TS39301/2/3/4 offers extremely low dropout (typically 400mV at 3A) and low
quiescent current (typically 36mA at 3A).
The TS39301/2/3/4 is ideal for PC add-in cards that need to convert from standard 3.3V to 2.5V or 2.5V to 1.8V. A
guaranteed maximum dropout voltage of 500mV over all operating conditions allows the TS39301/2/3/4 to provide
2.5V from a supply as low as 3V, and 1.8V from a supply as low as 2.5V. The TS39301/2/3/4 also has fast transient
response for heavy switching applications. The device requires only 47uF of output capacitor to maintain stability and
achieve fast transient response.
On the TS39301/2/3/4, the enable pin may be tied to input voltage if it is not required for enable control. This series
are offered in 5-pin TO-220, TO-263 package.
Features
Ordering Information
Dropout voltage typically 0.4V @Io=3A
Part No.
Operating Temp.
Package
Output current up to 3A
TS39301CZ5xx
TS39302CZ5
Low ground current
TO-220-5L
TS39303CZ5xx
TS39304CZ5xx
TS39301CM5xx
TS39302CM5
Current limiting and Thermal shutdown
Extremely fast transient response
Reversed leakage protection
Reverse battery protection
-40 ~ +125 oC
TO-263-5L
TS39303CM5xx
TS39304CM5xx
TTL/CMOS compatible enable pin
Error flag output (TS39301 only)
Adjustable version (TS39302 only)
Output voltage sense (TS39303 / 4 only)
Note: Where xx denotes voltage option, available are
50 = 5.0V
33 = 3.3V
25 = 2.5V
18 = 1.8V
Applications
Battery power equipment
High efficiency linear power supplies
High efficiency post regulator for switching supply
Low-voltage microcontrollers and digital logic
SMPS post regulator
LDO linear regulator for PC add-in cards
PowerPCTM power supplies
Multimedia and PC processor supplies
TS39301/2/3/4
1-7
2005/12 rev. A
Absolute Maximum Rating (Note 1)
Supply Voltage
Vin
Ven
TSTG
-20V ~ +20
+20
V
V
Enable Voltage
Storage Temperature Range
Lead Soldering Temperature (260 oC)
ESD
-65 ~ +150
5
oC
S
(Note 3)
Operating Rating (Note 2)
Operation Input Voltage
Vin (operate)
+2.5 ~ +16
+16
V
V
Operation Enable Voltage
Ven (operate)
Power Dissipation (Note 4)
PD
TJ
Internally Limited
-40 ~ +125
W
oC
Operating Junction Temperature Range
Electrical Characteristics
(Vin = Vout + 1V, Venable= 2.4V, Tj = 25 oC, unless otherwise specified.)
Parameter Conditions
Output Voltage IL=10mA
Min
Typ
Max
Unit
0.990|Vo|
1.010|Vo|
5.0 / 3.3
2.5 / 1.8
V
10mA ≤ IL ≤ 3A,
Output Voltage
0.980|Vo|
1.020|Vo|
Vo+1V ≤ Vin ≤ 8V
IL=10mA, Vo+1V ≤Vin≤ 8V
Vin=Vout+1V, 10mA≤IL≤3A
(Note 5)
Line Regulation
--
--
--
--
--
--
--
--
--
--
--
--
0.06
0.2
40
0.5
1.0
100
200
--
%
%
Load Regulation
Output Voltage Temp. Coefficient
ppm/ oC
IL=100mA
65
IL=750mA
IL=1.5A
185
250
400
6
ΔVout= -1%
Dropout Voltage (Note 6 & 8)
Quiescent Current (Note 7)
mV
--
IL=3.0A
550
10
20
--
IL=100mA
IL=750mA
IL=1.5A
10
Vin=Vout+1V
mA
A
17
IL=3.0A
45
--
Current Limited
Vout=0, Vin=Vout+1V
4.5
--
Enable Input (TS39301/2/3/4)
Low (OFF)
High (ON)
VEN=2.25V
VEN =0.8V
--
2.25
--
--
--
--
--
--
0.8
--
Input Logic Voltage
V
75
4
Enable Pin Input Current
µA
µA
--
Shutdown Output Current (Note 8)
--
20
Adjustable Output (TS39302)
0.980|Vo|
1.24
1.020|Vo|
Reference Voltage
V
TS39301/2/3/4
2-7
2005/12 rev. A
Electrical Characteristics
Flag Output (TS39301)
Output Leakage Current
Output Low Voltage (Note 9)
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
VOH=16V
--
--
--
--
--
--
1
2
400
99
--
µA
mV
%
Vin=2.5V, IOL=250uA
% of Vout
--
% of Vout
93
--
%
--
%
Thermal Performance
Condition
Package type
TO-220-5L
Typ
2
Unit
Thermal Resistance
Junction to Case
oC/W
TO-263-5L
2
Note 1. Exceeding the absolute maximum ratings may be damaged the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended.
Note 4. Pd
= (Tj - Ta) + Өja, where Өja depends upon the printed circuit layout. See ”Applications
(max)
(max)
Information”.
Note 5. Output voltage temperature coefficient is ΔVout
+ (Tj
(max)
– Tj
(min)
) where Tj
is +125 oC and
(max)
(worst case)
Tj
(min)
is -40 oC.
Note 6. Vdrop = Vin - Vout when Vout decreases to 99% of its nominal output voltage with Vin = Vout + 1. For output
voltages below 2.5V, dropout voltage is the input-to-output voltage differential with the minimum input voltage
being 2.5V. Minimum input operating voltage is 2.5V
Note 7. Ignd is the quiescent current. Iin = Ignd + Iout
Note 8. Ven<0.8V, Vin<8V and Vout=0
Note 9. For 1.8V device, Vin = 2.25V (device is in dropout)
Block Diagram
TS3930x series
*
Feedback network is fixed output versions only (TS39301 & TS39303 & TS39304)
** Adjustable output version only (TS39302)
TS39301/2/3/4
3-7
2005/12 rev. A
Pin Assignment
Pin No.
Pin
Pin Description
Configuration
TS39301
TS39302
TS39303
TS39304
TTL/COMS compatible input. Logic high is
enable; logic low or open is shutdown
Unregulated input: +16V maximum supply
Ground pin and TAB/heatsink are internally
connected.
1
1
2
3
4
1
2
Enable
Input
2
3
4
5
2
3
4
1
3
5
Ground
Output
Flag
Regulator output
Open-collector output. Active low indicates
an output fault condition.
Feedback input. Connect to resistive
voltage-divider network.
5
Adjust
Sense
5
4
Sense pin is the input to the error amplifier
Typical Application Circuit
TS39301
TS39302
TS39303 / 4
TS39301/2/3/4
4-7
2005/12 rev. A
Application Information
Application Information
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.
The TS39300/1/2/3/4 series are high performance with
low dropout voltage regulator suitable for moderate to
high current and voltage regulator application. Its
630mV dropout voltage at full load and over
temperature makes it especially valuable in battery
power systems and as high efficiency noise filters in
post regulator applications. Unlike normal NPN
transistor design, where the base to emitter voltage
drop and collector to emitter saturation voltage limit the
minimum dropout voltage, dropout performance of the
PNP output of these devices is limited only by low Vce
saturation voltage.
Input Capacitor Requirement
An input capacitor of 1uF or greater is recommended
when the device is more than 4” away from the bulk
AC supply capacitance or when the supply is a battery.
Small, surface mount, ceramic chip capacitors can be
used for bypassing. Larger values will help to improve
ripple rejection by bypassing the input to the regulator,
further improving the integrity of the output voltage.
The TS39300/1/2/3/4 series is fully protected from
damage due to fault conditions. Linear current limiting is
provided. Output current during overload conditions is
constant. Thermal shutdown the device when the die
temperature exceeds the maximum safe operating
temperature. Transient protection allows device 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.
Minimum Load Current
The TS39130/1/2/3/4 series 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 adjustable regulator versions (TS39302) is allow
to programming the output voltage anywhere between
1.25 and the 16V maximum operating rating of the
family.
Output Capacitor Requirement
The TS39300/1/2/3/4 series requires an output
capacitor to maintain stability and improve transient
response is necessary. The value of this capacitor is
dependent upon the output current, lower currents allow
smaller capacitors. TS39300/1/2/3/4 series output
capacitor selection is dependent upon the ESR of the
output capacitor to maintain stability. When the output
capacitor is 47uF or greater, the output capacitor
should have an ESR less than 1Ω. This will improve
transient response as well as promote stability. Ultra
low ESR capacitors, such as ceramic chip capacitors,
may promote instability. These very low ESR levels
may cause an oscillation and/or under damped
transient response. A low ESR solid tantalum capacitor
works extremely well and provides good transient
response and stability over temperature aluminum
electrolytes can also be used, as long as the ESR of
the capacitor is <1Ω.
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 / 1.24) – 1]
Where Vout is the desired output voltage. Above
application circuit shows component definition.
Applications with widely varying load currents may
scale the resistors to draw the minimum load current
required for proper operation.
TS39301/2/3/4
5-7
2005/12 rev. A
Application Information (continues)
Error Flag
The device have been designed to respond quickly to
load current variations and input voltage variations.
Large output capacitors are not required to obtain this
TS39301 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 over-current fault (the device is in current
limit) or low input voltage. The flag output is
inoperative during over temperature shutdown
conditions. A pull-up resistor from error flag to either
Vin or Vout is required for proper operation. For
information regarding the minimum and maximum
values of pull-up resistance, refer the graph as follow:
performance.
A
standard 47uF 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 base
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 or 1.8V without
operating in dropout, NPN based regulators require an
input voltage of 3.7V at the very least.
The TS39300 series 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.
Power Dissipation
Determine the power dissipation requirements for the
design along with the maximum ambient temperature at
which the device will be operated.
Pd = (Vin- Vout) * Iout + Vin * Ignd
The heat sink thermal resistance is determined by:
When the error flag is not used, it is best to leave
it open, the error flag pin can be tied directly to output
Pin.
Өsa = [Tj(max) – Ta] / Pd – (Өjc + Өcs)
When Tj(max) < 125 oC, and Өcs is between 0 oC and 2
oC/W, the heat sink may be significantly reduced in
applications where the input voltage is known and large
compare with the dropout voltage.
Enable Input
TS39301/2/3/4 versions feature an active-high enable
(EN) input 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 interfacing with logic interfacing. EN may be
directly tied to Vin and pulled up to the maximum
supply voltage.
Output Sense
Sense pin can be connect to the load and traces the
load voltage, TS39303/4 will adjust the output voltage to
maintain the load at expected voltage.
Transient Response and 3.3V to 2.5V
or 2.5V to 1.8V Conversion
TS39301/2/3/4 has excellent transient response to
variations in input voltage and load current.
TS39301/2/3/4
6-7
2005/12 rev. A
TO-220-5L Mechanical Drawing
G
TO-220-5L DIMENSION
MILLIMETERS INCHES
MIN
H
B
A
DIM
MIN
MAX
10.50
4.440
2.940
1.020
1.830
14.13
5.225
1.370
29.44
2.925
0.477
8.800
6.510
15.31
MAX
0.413
0.175
0.116
0.040
0.072
0.556
0.206
0.054
1.159
0.115
0.019
0.346
0.256
0.603
M
L
A
B
C
D
E
F
G
H
I
10.00
3.240
2.440
0.260
1.570
13.31
4.475
1.170
27.60
2.175
0.297
8.280
6.010
14.29
0.394
0.128
0.096
0.010
0.062
0.524
0.176
0.046
1.087
0.086
0.012
0.326
0.237
0.563
N
I
J
F
K
L
M
N
K
J
D
E
TO-263-5L Mechanical Drawing
TO-263-5L DIMENSION
MILLIMETERS INCHES
DIM
MIN
10.220
14.600
0.750
1.573
4.560
1.240
2.280
0.280
8.240
1.540
MAX
10.260
15.870
0.770
1.827
4.570
1.270
2.790
0.320
8.280
1.800
MIN
MAX
0.404
0.625
0.030
0.072
0.180
0.050
0.110
0.013
0.326
0.071
A
B
C
D
E
F
G
H
I
0.402
0.575
0.030
0.062
0.179
0.049
0.090
0.011
0.324
0.060
J
TS39301/2/3/4
7-7
2005/12 rev. A
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