TSC TS90021CX5

TS9002
300mA CMOS LDO with Enable & Power Good
Pin assignment
1. Input
2. Ground
3. Enable
4. Power Good
5. Output
Low Drop Out Voltage 0.4V
Enable Shutdown
Power Good
General Description
The TS9002 series is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent
current (30uA typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications.
The Chip Enable (CE) includes a CMOS or TTL compatible input allows the output to be turned off to prolong battery life.
The TS9002 series is included a precision voltage reference, error correction circuit, a current limited output driver, over
temperature shutdown, and a “Power Good” detector, which pulls low when the output is out of regulation.
This series are offered in 5-pin SOT-25 package.
Features
Ordering Information
Dropout voltage typically 0.4V@Io=300mA (Vo>2.5V)
Low power consumption
Part No.
Operating Temp.
(Ambient)
TS9002xCX5
-40 ~ +85 oC
SOT-25
Note: Where x denotes voltage option, available are
1=1.2V
A=1.5V
K=2.5V,
S=3.3V,
Contact factory for additional voltage options.
Output voltage +/-2%, +/-3% (1.2V)
Internal current limit and thermal shutdown
Short circuit current fold-back
Power saving shutdown mode
Power good output function
Applications
Typical Application Circuit
Palmtops
Video recorders
Battery powered equipment
PC peripherals
High-efficiency linear power supplies
Digital signal camera
Block Diagram
TS9002 series
Package
1-1
2004/09 rev. B
Absolute Maximum Rating
Input Supply Voltage
Vin
+7
V
Enable Input Voltage
Vce
Gnd-0.3 ~ Vin+0.3
V
Output Current
Io
Pd / (Vin – Vout)
Power Dissipation
PD
380
Thermal Resistance
Өja
260
Tj
-40 ~ +125
o
C
-65 ~ +150
o
C
Operating Junction Temperature Range
Storage Temperature Range
TSTG
Lead Soldering Temperature (260 oC)
mW
o
10
C/W
S
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
Electrical Characteristics
(Ta = 25 oC, Io=0.1mA, Cout=2.2uF, Vce≥2V; Vin >2.7V & Io<150mA for 1.2V output type, unless otherwise specified.)
Parameter
Output Voltage
Conditions
Typ
Max
Unit
V
Vin=Vo + 1V
Vout > 1.5V
0.985|Vo|
1.015|Vo|
Vin=2.7V
Vout <1.5V
0.970|Vo|
1.030|Vo|
Vout Temperature Coefficient
Maximum Output Current
Min
--
30
--
ppm/ oC
mA
Vin=Vo + 1V
Vout > 1.5V
300
--
--
Vin=2.7V
Vout <1.5V
150
--
--
Line Regulation
Vo+1V ≤ Vin ≤ Vo+2V
--
--
0.3
%
Load Regulation
Vin=Vo+1V, 1mA≤IL≤300mA
--
0.2
1.0
%
Load Regulation (1.2V output)
Vin=2.7V, 1mA≤IL≤150mA
--
1
4.0
Dropout Voltage
Io=300mA,
Vout≥2.0V
--
300
400
Vout=Vo - 2%
Vout<2.0V
--
800
1300
mV
Quiescent Current
Vin≤0.4V (shutdown)
--
1
2
uA
Quiescent Current
Vout≥0.4V,
Vout > 1.5V
--
30
50
uA
Io=0mA
Vout <1.5V
--
50
80
Vout=0V
Vout > 1.5V
--
450
--
Vout <1.5V
--
350
--
At f=1kHz,
--
50
--
At f=10kHz,
--
20
--
Io=10mA, f=10Hz to 100kHz,
--
30
--
uVrms
Enable Input Logic-Low Voltage
Regulation shutdown
--
--
0.4
V
Enable Input Logic-High Voltage
Regulation enable
2.0
--
--
V
Enable Input Current
VIL≤0.4V
--
--
0.5
uA
VIL≥2.0V
--
--
0.1
Output Current Limit
Power Supply Rejection Ratio
Output Noise
Io=100mA,
mA
dB
Enable Input
TS9002 series
2-2
2004/09 rev. B
Electrical Characteristics (continued)
Power Good
Output under voltage
Output over voltage
1.5V ≤ Vo(NOM)
--
--
85
%
Vo(NOM) < 1.5V
--
--
75
Vo(NOM)
2.5V ≤ Vo(NOM) ≤ 5.0V
115
--
--
%
1.2V ≤ Vo(NOM) ≤ 2.5V
125
--
--
Vo(NOM)
PG leakage current
VPG = 7V
--
--
1
uA
PG voltage rating
Vo in regulation
--
--
7
V
PG voltage low
Isink = 0.4mA
Vo >1.5V
--
--
0.4
V
Isink = 0.1mA
Vo < 1.5V
--
--
0.1
Detail Description
Description
The TS9002 series of CMOS regulators contain a P-MOS pass transistor, voltage reference, error amplifier, over
current protection, thermal shutdown and power good function.
The TS9002 series switches from voltage mode to current mode when the load exceeds the rated output current. This
prevents over stress. The TS9002 also incorporates current fold-back to reduce power dissipation when the output is
short circuit. This feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%.
Full current is restored when the voltage exceeds 0.8V.
The internal P-channel pass transistor receives data from the error amplifier, over current shutdown, short output
protection and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to
a precision reference. Over current and thermal shutdown circuits become active when the junction temperature
exceeds 150 oC, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 oC.
Enable
The Chip Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all
internal circuits are powered down. In this state, the quiescent current is less than 1uA. This pin behaves much like an
electronic switch.
External Capacitor
The TS9002series is stable with an output capacitor to ground of 2.2uF or greater. It can keep stable even with higher
or poor ESR capacitors.
A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be
larger than 0.1uF to have a beneficial effect.
All capacitors should be placed in close proximity to the pins. A “quiet” ground termination is desirable.
Power Good
The TS9002 includes the Power Good feature. When the output is not within = +/-15% of the specified voltage, it pulls
low. This can occur on other condition – input voltage too low, during over-temperature, during over-current and
output is pulled up.
TS9002 series
3-3
2004/09 rev. B
Typical Electrical Characteristics
TS9002 series
4-4
2004/09 rev. B
SOT-25 Mechanical Drawing
DIM
A
B
C
D
E
F
H
L
TS9002 series
5-5
SOT-25 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
2.70
3.00
0.106
0.118
0.25
0.50
0.010
0.020
1.90(typ)
0.075(typ)
0.95(typ)
0.037(typ)
1.50
1.70
0.059
0.067
1.05
1.35
0.041
0.053
2.60
3.00
0.102
0.118
0.60(typ)
0.024(typ)
2004/09 rev. B