TSC TS5201CSRF

TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
SOP-8
Pin Definition:
1. Output
2. ADJ / N/C
3. Ground
4. N/C
8. Input
7. N/C
6. N/C
5. Enable
General Description
TS5201 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 (EN) 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. TS5201 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.
Features
Typical Application Circuit
●
Ultra Low Noise Output
●
Output Current up to 200mA
●
Low Dropout Voltage
●
Low Power Consumption
●
“Zero” Off-mode Current
●
Logic Controlled Electronic Enable
●
Internal Current Limit
●
Thermal Shutdown Protection
VOUT
COUT
2.2uF
VIN
R1
EN
R2
on
off
Adjustable Version: VOUT = 1.24 (R1+R2)/R2
(Adjustable output range up to 8V)
Application
●
Cellular Telephones
●
Palmtops, Notebook Computers
●
Battery Powered Equipment
●
Consumer and Personal Electronics
●
SMPS Post Regulator and DC to DC Modules
●
High-efficiency Linear Power Supplies
●
Portable Application
EN (pin3) may be connected directly to VIN (pin 1)
Low noise operation: CBYP =470pF, COUT >2.2uF
Basic operation: CBYP =not used, COUT >2uF
Ordering Information
Part No.
TS5201CS RF
Package
Packing
SOP-8
2.5Kpcs / 13” Reel
Absolute Maximum Rating (Note 1)
Parameter
Symbol
Value
Unit
Input Supply Voltage
VIN
-20~ +20
V
Enable Input Voltage
Power Dissipation (Note 2)
VCE
PD
-20~ +20
Internal limited
V
Thermal Resistance
Operating Junction Temperature Range
Storage Temperature Range
ӨJA
TJ
TSTG
220
0 ~ +125
-65 ~ +150
o
Lead Soldering Temperature (260 C)
5
1/7
o
C/W
o
C
o
C
S
Version: B07
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Recommend Operating Rating (Note 3)
Input Supply Voltage
VIN
+2.5 ~ +16
V
Enable Input Voltage
VCE
0 ~ VIN
V
Electrical Characteristics VIN=Vo+1V, Io=100uA, COUT=1uF, Vce≥2V, TJ = 25oC, unless otherwise specified.
Output Voltage
Conditions
VIN =Vo + 1V
Output Voltage Temp. Coefficient
Line Regulation
(Note 4)
Vo+1V ≤ VIN ≤ 16V
---
40
0.005
-0.05
ppm/ C
%/V
Load Regulation (Note 5)
0.1mA ≤ Io ≤ 200mA
Io=100uA
---
0.02
17
0.2
50
%/V
Io=50mA
Io=100mA
---
110
140
150
250
Io=200mA
VIN ≤0.4V (shutdown)
VIN ≤0.18V (shutdown)
----
165
0.01
--
275
1
5
Io=100uA
Io=50mA
---
80
350
125
600
Io=100mA
Io=200mA
---
600
1300
1000
1900
---
300
75
500
--
mA
dB
Parameter
Dropout Voltage (Note 6)
Quiescent Current
Ground Pin Current (Note 7)
Vce≥2V
Output Current Limit
Power Supply Rejection Ratio
VOUT=0V
At f=100Hz, Io=100uA,
Thermal Regulation (Note 8)
Min
0.99|Vo|
Typ
VOUT
Max
1.01|Vo|
Unit
V
o
mV
uA
uA
--
0.05
--
%/W
Io=50mA, COUT=2.2uF,
470pF from bypass to Ground
--
260
--
nV
Enable Input Logic-Low Voltage
Regulation shutdown
--
--
0.4
V
Enable Input Logic-High Voltage
Regulation enable
VIL≤ 0.4V
2.0
--
-0.01
--1
V
--
5
20
Output Noise
Enable function
Enable Input Current
VIH≥ 2.0V
uA
Block Diagrams
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Version: B07
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Electrical Specification (Continue)
Note:
1. Exceeding the absolute maximum rating may damage the device.
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.
3. The device is not guaranteed to function outside its operating rating.
4, Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature
range.
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 (5V version) and 1mA to 120mA (VOUT<5V version). Changes
in output voltage due to heating effects are covered by the thermal regulation specification.
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.
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.
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.
Application Information
Enable Input
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
An input capacitor of 0.1uF 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.
Output Capacitor Requirement
The TS5201 series requires an output capacitor to maintain stability and improve transient response is necessary.
2.2uF minimum is recommended. Larger values improve the regulator’s transient response. The output capacitor
value may be increased without limit.
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. Most of tantalum or aluminum electrolytic capacitors are adequate; film types will work. Since many
o
aluminum electrolytic have electrolytes that freeze at about –30 C, solid tantalums are recommended for operation
o
below –25 C. 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.
Reference Bypass Capacitor
Bypass is connected to the internal voltage reference. A 470pF 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 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.
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Version: B07
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Application Information (Continue)
No Load Stability
The TS5201 series will remain stable and in regulation with no load, unlike many other voltage regulators. This is
especially important in CMOS RAM keep alive applications.
Adjustable Regulator Design
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 8V 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:
A capacitor from Adjust to Ground provides greatly improved noise performance.
VOUT
COUT
2.2uF
VIN
R1
EN
R2
on
off
Adjustable Version: VOUT = 1.24 (R1+R2)/R2
(Adjustable output range up to 8V)
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.
Thermal Characteristics
TS5201 series is designed to provide 200mA (5V version) 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:
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:
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 TS5201CS at room
temperature with a minimum footprint layout, the maximum input voltage for a set output current can be determined
as follows:
o
o
o
PD(MAX) = (125 C – 25 C) / 220 C/W
PD(MAX) = 455mW
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Version: B07
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Application Information (Continue)
o
The junction to ambient thermal resistance for the minimum footprint is 220 C/W, the maximum power dissipation
must not be exceeded for proper operation. Using the output voltage of 3.3V and an output current of 120mA, the
maximum input voltage can be determined. From the electrical characteristics table, the maximum ground current for
120mA 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 SOP-8
package.
Noise Reduction Capacitors
On adjustable devices, a capacitor from ADJ to GND will decrease high frequency noise on the output. See following
figure:
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.
5/7
Version: B07
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
SOP-8 Mechanical Drawing
DIM
A
B
C
D
F
G
K
M
P
R
SOP-8 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX.
4.80
5.00
0.189
0.196
3.80
4.00
0.150
0.157
1.35
1.75
0.054
0.068
0.35
0.49
0.014
0.019
0.40
1.25
0.016
0.049
1.27BSC
0.05BSC
0.10
0.25
0.004
0.009
0º
7º
0º
7º
5.80
6.20
0.229
0.244
0.25
0.50
0.010
0.019
Marking Diagram
Y
M
L
= Year Code
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
= Lot Code
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Version: B07
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to any
intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for
such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale
and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability,
or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for
any damages resulting from such improper use or sale.
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Version: B07