CYT 6119
400mA CMOS LDO Regulator
General Description
The CYT6119 is an efficient linear voltage
regulator. It has extra low dropout voltage. At light
loads the typical dropout voltage is 15mV, at full
load the typical dropout voltage is 600mV. The
output voltage accuracy is better than 2%.
The CYT6119 has low ground current at 65uA,
so it can help prolong battery life. The CYT6119 is
specially designed for hand-held, battery -powered
devices.
Features
Typical 175mV dropout voltage at 150mA.
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Guaranteed 400mA output over the full
operating temperature range.
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Extremely tight load and line regulation.
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Low temperature coefficient.
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Current and thermal limiting.
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No-load stability.
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Standard SOT-89-3 package.
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RoHS Compliant and 100% Lead (Pb)-Free
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Applications
■
■
■
■
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Active SCSI terminators.
Post regulators for switching supplies.
Battery chargers.
High-efficiency linear power supplies.
Computer motherboard, display, graphic card
DC/DC converter, such as 5V to 3.3V, 3.3V
to 2.8V or 3.3V to 2.5V.
SOT-89
Package
ShenZhen CYT IC Design CO ,Ltd
1
Revision 12/4/2007
All contents are subject to change without prior notice.
CYT 6119
Pin Configuration
N:
1.GND
2.IN
3.OUT
G:
1.OUT
2.GND
3.IN
Application Diagram
Ordering Information
CYT6119-
X
X
X
PIN (1≥3)：1 G:OUT/GND/IN
2 N: GND/IN/OUT
Package Type:1 K: SOT-89-3L
Output Voltage:1 A:Vout=3.3V
2 B:Vout=2.8V
3 C:Vout=2.5V
4 D:Vout=1.8V
5 E:Vout=1.5V
6 F: Vout=3.0V
ShenZhen CYT IC Design CO ,Ltd
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Revision 12/4/2007
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CYT 6119
Absolute Maximum Ratings
(1)
Supply Input Voltage (VIN) ..….…..….…..….…..….…..….…..….…..….…..….
6V
Power Dissipation (PD) ……..….…..….…..….…..….…..….…..….…..….…..…
Internally Limited(3)
Junction Temperature (TJ) ….….. ..….…..….…..….…..….…..….…..….…..…
0°C to +150°C
Lead Temperature (soldering, 5 sec) ….…..….…..….…..….…..….…..….…..
260°C
Storage Temperature (TS) …. ..….…..….…..….…..….…..….…..….…..….…. -10°C to +150°C
Operating Ratings
(2)
Package Thermal Resistance …..….…..….…..….…..….…..….…..….…. ..…
Supply Input Voltage (VIN) ….…..….…..….…..….…..….…..….…..….…. …
Junction Temperature (TJ) …….. ..….…..….…..….…..….…..….
180°C /W
+2.8V to +5.5V
0°C to +125°C
Electrical Characteristics
VIN = VOUT + 1.0V; COUT = 4.7µF, IOUT = 10mA; TJ = 25°C;unless otherwise specified.
Symbol
Parameter
Conditions
CYT6119-1.5V
CYT6119-1.8V
CYT6119-2.5V
CYT6119-2.8V
CYT6119-3.3V
Note4
V
IN
=V
OUT
+1V to 5.5V
I
OUT
=10mA to 250mA
(5)
I
OUT
=10mA to 400mA
I
OUT
=10mA
I
OUT
=150mA
I
OUT
=250mA
I
OUT
=400mA
Thermal Protection
Temperature
Protection Hysterisys
F=120Hz
I
OUT
=10mA
I
OUT
=400mA
V
OUT
=0V
(5)
Min
1.470
1.764
2.450
2.744
3.234
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Typ
1.5
1.8
2.5
2.8
3.3
50
1
1
1.5
15
175
320
600
150
20
51
65
110
600
Max
1.530
1.836
2.550
2.856
3.366
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Units
V
OUT
Output Voltage Accuracy
V
△V
OUT
/△T
△V
OUT
/V
OUT
△V
OUT
/V
OUT
Output Voltage
Temperature Coefficient
Line Regulation
Load Regulation
(5)
ppm/℃
％
％
V
IN
-V
OUT
Dropout Voltage
(6)
mV
mV
℃
℃
dB
uA
mA
T
PROTECTION
PSRR
I
GROUND
I
LIMIT
Thermal Protection
Ripple Rejection
Ground Current
Current Limit
Note 1:
Exceeding the absolute maximum rating may damage the device.
Note 2:
The device is not guaranteed to function outside its operating rating.
ShenZhen CYT IC Design CO ,Ltd
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Revision 12/4/2007
All contents are subject to change without prior notice.
CYT 6119
Note 3:
The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) =
(TJ(MAX) - TA)/θJA. Exceeding the maximum allowable power dissipation will result in excessive die
temperature, and the regulator will go into thermal shutdown. See Table 1 and the “Thermal Considerations”
section for details.
Note 4:
Output voltage temperature coefficient is 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 100µA to 500mA. 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.
Application Hints
Like any Low dropout regulator,CYT6119 requires external capacitors to ensure stability. The external capacitors
must be carefully selected to ensure the performances.
Input Capacitor:
An Input Capacitor of at least 10uF is required. Ceramic or Tantalum can be used. The value can be
increased without upper limit.
Output Capacitor:
An Output Capacitor is required for look stability. It must be located no more than 1cm away from
the VOUT pin, and connected directly between VOUT and GND pins. The minimum value is 10uF but
once again its value can be increased without limit.
Thermal Consideration
It is important that the thermal limit of the package should not be exceeded. The CYT6119 has
built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and the
VOUT will be reset to zero. The power dissipation for a given application can be calculated as follows:
The Power Dissipation (PD) is
PD = IOUT * [VIN – VOUT]
The thermal limit of the package is then limited to PD(MAX) = [TJ – TA]/θJA where TJ is the
junction temperature, TA is ambient temperature, and
θJA
is around 180°C/W for CYT6119. CYT6119
is designed to enter thermal protection at 150°C. For example, if TA is 25°C then the max PD is limited
to about 0.7W. In other words, if IOUT(MAX) = 400mA, then [VIN – VOUT] can not exceed 1.75V.
ShenZhen CYT IC Design CO ,Ltd
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Revision 12/4/2007
All contents are subject to change without prior notice.
CYT 6119
Typical Performance Characteristics
(VIN = 5V, CIN = 1µF, COUT = 10µF, TA=25°C, unless otherwise noted.)
ShenZhen CYT IC Design CO ,Ltd
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Revision 12/4/2007
All contents are subject to change without prior notice.
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