TS5201_1 [TSC]
200mA Low Noise LDO Voltage Regulator with Enable; 路200mA的低噪音LDO稳压器具有使能型号: | TS5201_1 |
厂家: | TAIWAN SEMICONDUCTOR COMPANY, LTD |
描述: | 200mA Low Noise LDO Voltage Regulator with Enable |
文件: | 总6页 (文件大小:269K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TS5201
200mA Low Noise LDO Voltage Regulator with Enable
Pin assignment
Low Power Consumption
1. Output 5. Enable
2. ADJ / NC 6. NC
Low Dropout Voltage 0.275V
Fixed and Adjustable Output
Enable Shutdown
3. Ground
4. NC
7. NC
8. Input
General Description
The TS5201 series is an efficient linear voltage regulator with ultra low noise output, very low dropout voltage (typically
17mV at light loads and 165mV at 200mA), and very low power consumption (600uA at 100mA), providing high output
current even when the application requires very low dropout voltage. The Chip Enable (CE) includes a CMOS or TTL
compatible input allows the output to be turned off to prolong battery life. When shutdown, power consumption drops
nearly to zero.
The TS5201 series is included a precision voltage reference, error correction circuit, a current limited output driver, over
temperature shutdown, revered battery protection and a reference bypass pin to improve its already excellent low-noise
performance.
The TS5201 series is available in fixed and adjustable output voltage version in SOP-8 package.
Features
Ordering Information
Ultra low noise output.
Part No.
Operating Temp.
0 ~ +125 oC
Package
Output current up to 200mA
Low dropout voltage
TS5201CSxx
SOP-8
Note: Where xx denotes voltage option, available are
5.0V, 3.3V, 3.0V and 2.5V. Leave blank for
adjustable version. Contact factory for additional
voltage options.
Low power consumption
“Zero” off-mode current
Logic controlled electronic enable
Internal current limit and Thermal shutdown protection
Applications
Consumer and personal electronics
SMPS post regulator and DC to DC modules
High-efficiency linear power supplies
Cellular telephones
Palmtops, notebook computers
Battery powered equipment
Typical Application Circuit
Fixed Application
Adjustable Application
TS5201 series
1-6
2005/08 rev. C
Absolute Maximum Rating (Note 1)
Input Supply Voltage
Vin
Vce
PD
-20~ +20
-20~ +20
Internal limited
220
V
V
Enable Input Voltage
Power Dissipation (Note 2)
Thermal Resistance
Өja
Tj
oC/W
oC
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260 oC)
Recommend Operating Rating (Note 3)
0 ~ +125
-65 ~ +150
5
TSTG
oC
S
Input Supply Voltage
Enable Input Voltage
Vin
+2.5 ~ +16
0 ~ Vin
V
V
Vce
Electrical Characteristics
Vin=Vo+1V, Io=100uA, Cout=1uF, Vce≥2V, Tj = 25 oC, unless otherwise specified.
Parameter
Output Voltage
Output Voltage Temp. Coefficient (Note 4)
Conditions
Min
Typ
Vout
40
Max
1.01|Vo|
--
Unit
Vin=Vo + 1V
0.99|Vo|
V
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
ppm/ oC
Line Regulation
Vo+1V ≤ Vin ≤ 16V
0.1mA ≤ Io ≤ 200mA
Io=100uA
0.005
0.02
17
0.05
0.2
%/V
Load Regulation (Note 5)
%/V
50
Io=50mA
110
140
165
0.01
--
150
250
275
1
Dropout Voltage (Note 6)
Quiescent Current
mV
uA
uA
Io=100mA
Io=200mA
Vin≤0.4V (shutdown)
Vin≤0.18V (shutdown)
5
Io=100uA
80
125
600
1000
1900
500
--
Io=50mA
Io=100mA
Io=200mA
350
600
1300
300
75
Ground Pin Current (Note 7)
Vce≥2V
Output Current Limit
Vout=0V
mA
dB
Power Supply Rejection Ratio
Thermal Regulation (Note 8)
At f=100Hz, Io=100uA,
0.05
--
%/W
Io=50mA, Cout=2.2uF,
Output Noise
--
260
--
nV
470pF from bypass to Ground
Enable function
Enable Input Logic-Low Voltage
Enable Input Logic-High Voltage
Regulation shutdown
Regulation enable
VIL≤ 0.4V
--
2.0
--
--
--
0.4
--
V
V
0.01
5
-1
Enable Input Current
uA
VIH≥ 2.0V
--
20
TS5201 series
2-6
2005/08 rev. C
Electrical Characteristics (continued)
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The maximum allowable power dissipation at any Ta is Pd(max) = [ Tj(max) - Ta] + Өja. Exceeding the
maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into
thermal shutdown.
Note 3: The device is not guaranteed to function outside its operating rating.
Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total
temperature range.
Note 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 1mA to 200mA. Changes in output voltage due to heating effects
are covered by the thermal regulation specification.
Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value measured at 1V differential.
Note 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.
Note 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 200mA load pulse at Vin=16V for
t=10mS.
Block Diagrams
* Fixed Voltage
* Adjustable Voltage
Vout = Vref x (1+R2/R1)
TS5201 series
3-6
2005/08 rev. C
Application Information
Enable Input
Most of tantalum or aluminum electrolytic capacitors
are adequate; film types will work. Since many
aluminum electrolytic have electrolytes that freeze at
about –30oC, solid tantalums are recommended for
operation below –25oC. At lower values of output
current, less output capacitance is required for output
stability. The capacitor can be reduced to 0.47uF for
current below 10mA or 0.33uF for currents below 1mA.
TS5201 series feature an active-high (>2V) 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 is compatible with CMOS logic interfacing. EN
may be directly tied to Vin and pulled up to the
maximum supply voltage.
Input Capacitor Requirement
No Load Stability
An input capacitor of 1uF or greater is recommended
when the device is more than 10” away from the bulk
AC supply capacitance or when the supply is a battery.
The TS5201 series iwill remain stable and in regulation
with no load, unlike many other voltage regulators.
This is especially important in CMOS RAM keep alive
applications.
Reference Bypass Capacitor
Adjustable Regulator Design
Bypass is connected to the internal voltage reference. A
470uF capacitor (Cbypass) connected from Bypass to
Ground quiets this reference, providing a significant
reduction in output noise. Cbypass reduces the
regulator phase margin; when using Cbypass, output
capacitors of 2.2uF or greater are generally required to
maintain stability.
The adjustable regulator versions can be adjusted to a
specific output voltage by using two external resistors
to programming the output voltage anywhere between
1.25 and the 16V maximum operating rating of the
family.
Two resistors are used. Resistors can be quite large
up to 470kΩ, because of the very high input
impedance and low bias current of the sense
comparator, the resistor values are calculated by:
The star up speed of the TS5201 is inversely
proportional to the size of the reference bypass
capacitor. Applications requiring a slow ramp up of
output voltage should consider larger values of
Cbypass. Likewise, if rapid turn on is necessary,
consider omitting Cbypass. If output noise is not a
major concern, omitted Cbypass and leave Bypass
open.
Vout = 1.242V * (R2 / R1 + 1)
Output Capacitor Requirement
The TS5201 series requires an output capacitor to
maintain stability and improve transient response is
necessary. The value of this capacitor is dependent
upon whether a reference bypass capacitor is used.
1uF minimum is recommended when Cbypass is not
used. 2.2uF minimum is recommended when Cbypass
is 470uF. Larger values improve the regulator’s
transient response. The output capacitor value may be
increased without limit.
A capacitor from Adj to Ground provides greatly
improved noise performance.
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.
The output capacitor should have an ESR (effective
series resistance) less than 5Ω 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.
TS5201 series
4-6
2005/08 rev. C
Application Information (continues)
Thermal Characteristics
Noise Reduction Capacitors
On adjustable devices, a capacitor from ADJ to GND
TS5201 series is designed to provide 200mA 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-ambient thermal resistance
of the device and the following basic equation:
will decrease high frequency noise on the output. See
following figure
Pd(max) = [ Tj(max) – Ta ] /Θja
Tj(max) is the maximum junction temperature of the
die(125oC), and Ta is the ambient operating
temperature. Θja is layout dependent, the actual
power dissipation of the regulator circuit can be
determined using the equation:
Minimum Load
The TS5201 will remain stable and in regulation
with no load unlike many other voltage regulators.
This is especially important in CMOS RAM
keep-alive applications.
Pd = ( Vin – Vout ) * Iout + Vin * Ignd
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
TS5201CX533 at room temperature with a minimum
footprint layout, the maximum input voltage for a set
output current can be determined as follows:
Pd(max) = (125oC – 25oC) / 220oC/W
Dual-Supply Systems
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.
Pd(max) = 455mW
The junction to ambient thermal resistance for the
minimum footprint is 220oC/W, the maximum power
dissipation must not be exceeded for proper operation.
Using the output voltage of 3.3V and an output current
of 200mA, the maximum input voltage can be
determined. Formt eh electrical characteristics table,
the maximum ground current for 200mA output current
is 2.5mA.
445mW = ( Vin – 3.3V ) * 200mA + Vin * 2.5mA
445mW = Vin * 200mA – 3.3 * 200mA + Vin * 2.5mA
445mW = Vin * 200mA – 495mW + Vin * 2.5mA
950mW = Vin * 152.5mA
Vin(max) = 6.23v
Therefore, a 3.3V application at 200mA of output
current can accept a maximum input voltage of 6.23V
in a SOT-25 package.
TS5201 series
5-6
2005/08 rev. C
SOP-8 Mechanical Drawing
SOP-8 DIMENSION
MILLIMETERS
INCHES
MIN MAX
DIM
MIN
4.80
3.80
1.35
0.35
0.40
MAX
5.00
4.00
1.75
0.49
1.25
A
B
C
D
F
0.189
0.150
0.054
0.014
0.016
0.196
0.157
0.068
0.019
0.049
G
K
M
P
R
1.27 (typ)
0.05 (typ)
0.10
0o
0.25
7o
0.004
0o
0.009
7o
5.80
0.25
6.20
0.50
0.229
0.010
0.244
0.019
TS5201 series
6-6
2005/08 rev. C
相关型号:
©2020 ICPDF网 联系我们和版权申明