TS9005
600mA Low Noise CMOS LDO
SOT-223
Pin Definition:
1. Input
2. Ground
3. Output
SOT-89
Pin Definition:
1. Ground
2. Input
3. Output
General Description
The TS9005 series is a positive voltage regulator developed utilizing CMOS technology featured low quiescent
current, low dropout voltage and high output voltage accuracy. Built in low on-resistor provides low dropout voltage
and large output current. A 2.2uF or greater can be used as an output capacitor.
The TS9005 series are prevented device failure under the worst operation condition with both thermal shutdown and
current fold-back. These series are recommended for configuring portable devices and large current application,
respectively.
Features
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●
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Dropout voltage typically 0.53V @ 600mA load (3.3V)
Output current up to 600mA
Low quiescent current
Output voltage trimmed before assembly
Internal current limit
Only need output & input capacitor
Ordering Information
Part No.
Package
Packing
TS9005xCW RP
SOT-223
2.5Kpcs / 13” Reel
TS9005xCY RM
SOT-89
1Kpcs / 7” Reel
Note: Where
x
denotes voltage option, available are
A=1.5V
D=1.8V
K=2.5V
P=3.0V
S=3.3V
V=3.6V
Contact factory for additional voltage options.
Applications
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PDA, Palmtops and Notebook
Personal communication devices
Bluetooth portable radios
PC peripherals
CD-ROM
Digital signal camera
Block Diagram
Typical Application Circuit
V
IN
V
OUT
C
IN
1uF
C
OUT
2.2uF
1/7
Version: A07
TS9005
600mA Low Noise CMOS LDO
Application Information
Input / Output Capacitor
It is recommended to use a 0.47uF capacitor on the TS9005/A input and a 0.47uF capacitor on the output. For high
regulation performance, larger input capacitor values and lower ESRs provide better noise rejection and line-transient
response. The output noise, load-transient response, stability, and power-supply rejection can be improved by using
large output capacitors. Low ESR ceramic capacitors provide optimal performance and save space.
Power Supply Rejection and Transient Response
The PSRR and transient response can be improved by increasing the values of the input and output bypass
capacitors, and through passive filtering techniques
Function Description
Description
The TS9005/A is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. It is supplied in a SOT-25
package for difference applications. This device can supply loads up to 600mA. As shown in the functional block
diagram, the TS9005/A consists of a reference and noise bypass circuit, error amplifier, output drive transistor, internal
feedback voltage divider, thermal sensor, and short circuit current limiter. The internal reference is connected to the
error amplifier’s inverting input. The error amplifier compares this reference with the feedback voltage and amplifies the
difference. If the feedback voltage is lower than the reference voltage, the pass transistor gate is pulled low. This allows
more current to pass to the output and increases the output voltage.
Stability
The TS9005/A is a high performance LDO emphasizing stability with low output capacitance. It is able to maintain
stability with an output capacitor can also be increased to optimize performance. The TS9005/A will remain stable and
in regulation with no load, unlike many other voltage regulators.
Internal P-Channel Pass Transistor
The TS9005/A features a low impedance P-channel MOSFET pass transistor. This provides several advantages over
similar designs using a PNP pass transistor, including low operating power and longer battery life. The TS9005/A
consumes only 100µA of quiescent current under most conditions.
Output Short-Circuit Current Limit
The TS9005/A includes a current limiter, which monitors and controls the pass transistor’s gage voltage, limiting the
output current to about 420mA, for example, in a short-circuit output situation.
Shutdown
The TS9005/A also features a low-power active shutdown mode. It has a switch that turns off the device when disabled.
This allows the output capacitor and load to discharge and de-energize the load. In the shutdown mode, the internal
functional blocks, such as voltage reference and the error amplifier, are turned off completely, and the quiescent current
is less than 1µA.
Thermal Protection Shutdown
The thermal protection shutdown function protects the device from operating in over temperature condition. When the
junction temperature exceeds +160oC, the thermal sensor signals the shutdown logic, turning off the pass transistor
and allowing the IC to tool down. The thermal sensor turns the pass transistor on again after the IC’s junction
temperature drops to +140oC.
Soft-Start Circuitry
The TS9005/A includes a soft-start circuitry to limit inrush current at turn-on. During power up, the output capacitor and
output load are charged with a reduce output current. Shortly after the initial power up, the soft-start feature is
terminated and normal operation is resumed.
3/7
Version: A07
TS9005
600mA Low Noise CMOS LDO
SOT-223 Mechanical Drawing
SOT-223 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
6.350
6.850
0.250
0.270
2.900
3.100
0.114
0.122
3.450
3.750
0.136
0.148
0.595
0.635
0.023
0.025
4.550
4.650
0.179
0.183
2.250
2.350
0.088
0.093
0.835
1.035
0.032
0.041
6.700
7.300
0.263
0.287
0.250
0.355
0.010
0.014
10°
16°
10°
16°
1.550
1.800
0.061
0.071
DIM
A
B
C
D
E
F
G
H
I
J
K
Marking Diagram
A
Y
M
= Device Code
= 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)
L
= Lot Code
XX
= Fixed Output Voltage Code
A=1.5V, D=1.8V, K=2.5V, P=3.0V, S=3.3V, V=3.6V
5/7
Version: A07
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