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400mA Super LDO Linear Regulator
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.
CYT6119
Features
Typical 175mV dropout voltage at 150mA. Low Ground current at 65uA. (Typ.) Guaranteed 400mA output over the full operating temperature range. Extremely tight load and line regulation. Low temperature coefficient. Current and thermal limiting. No-load stability. Standard SOT-89-3 package.
Pin Configuration
Top view
Applications
Active SCSI terminators. Post regulators for switching supplies. Battery chargers. High-efficiency linear power supplies.
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2
3
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
Typical Application
Ordering Information
CYT6119 _ _ _
5V
Vin
C0 C=10u
M0
Vout
C1 C=10u
3.3V
R2 rload
PIN (1=>3): 1. G: OUT/GND/IN 2. N: GND/IN/OUT
gnd
Control Logic
gnd
1.25V Ref
Over Current Protection gnd
Thermal Protection
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
All contents are subject to change without prior notice. 1
400mA Super LDO Linear Regulator
Absolute Maximum Ratings(1)
Supply Input Voltage (VIN) ................................+6V Power Dissipation (PD) .............. Internally Limited
(3)
CYT6119
Operating Ratings(2)
Supply Input Voltage (VIN) .............. +2.8V to +5.5V Junction Temperature (TJ) ............... 0C to +125C Package Thermal Resistance .......................................... 180C/W
Junction Temperature (TJ) .............................. 150C Lead Temperature (soldering, 5 sec.) .............. 260C Storage Temperature (TS) .............. -10C to +150C
Electrical Characteristics
VIN = VOUT + 1.0V; CIN = 2.2F; COUT = 2.2F, IOUT = 10mA; TJ = 25C, unless otherwise specified. Symbol Parameter Conditions CYT6119-1.5V CYT6119-1.8V VOUT Output Voltage Accuracy CYT6119-2.5V CYT6119-2.8V CYT6119-3.0V CYT6119-3.3V VOUT /T VOUT / VOUT VOUT / VOUT Output Voltage Temperature Coefficient Line Regulation Load Regulation
(5)
Min 1.470 1.764 2.450 2.744 2.940 3.234 ---------------
Typ 1.5 1.8 2.5 2.8 3.0 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 3.060 3.366 ---------------
Units
V
Note 4 VIN = VOUT + 1V to 5.5V IOUT =10mA to 250mA(5) IOUT =10mA to 400mA(5) IOUT =10mA
ppm/ % %
VIN - VOUT
Dropout Voltage(6)
IOUT =150mA IOUT =250mA IOUT =400mA
mV
TPROTECTION PSRR IGROUND ILIMIT
Thermal Protection Ripple Rejection Ground Current Current Limit
Thermal Protection Temperature Protection Hysterisys f =120Hz IOUT =10mA IOUT =400mA VOUT =0V

dB uA mA
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400mA Super LDO Linear Regulator
Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating.
CYT6119
Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) - TA)/JA. 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 100A to 400mA. 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.
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400mA Super LDO Linear Regulator
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.
CYT6119
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]/JA where TJ is the junction temperature, TA is ambient temperature, and JA is around 180C/W for CYT6119. CYT6119 is designed to enter thermal protection at 150C. For example, if TA is 25C 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.
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.
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400mA Super LDO Linear Regulator
Typical Performance Characteristics
(VIN = 5V, CIN = 1F, COUT = 10F, TA=25C, unless otherwise noted.)
Load Regulation 3.5 3
CYT6119
Output Voltage vs Temperature 3.5 3
Output Voltage (V)
1.5V 1.8V 2.5V 3.3V
Output Voltage
2.5 2 1.5 1 0 100 200 300 400 500 600 Output Current (mA)
2.5 2 1.5 1 0 50 100 150 Temperature (C)
1.5V 1.8V 2.5V 3.3V
Quiescent Current vs Temperature (Output Voltage @ 2.5V)
0.6
Dropout Voltage vs Output Current
1.17 1.16 1.15 1.14 1.13 1.12 1.11 1.1 1.09 1.08 1.07 1.06 0 20 40 60 80 100 120 140 Temperature (C)
0.5
Dropout Voltage (V)
Quiescent Current (mA)
0.4 0.3 0.2 0.1 0 0 100 200 300 400 500 600 Output Current (mA)
1.5V 1.8V 2.5V 3.3V
Line Transient
Load Transient (10mA - 500mA)
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400mA Super LDO Linear Regulator
Outline Drawing for SOT-89
DIM
SOT-89
A C D K L M J
CYT6119
N
DIMENSIONS INCHES MM MIN MAX MIN MAX
0.173 0.181 0.159 0.167 0.067 0.075 0.051 0.059 0.094 0.102 0.035 0.047 0.118REF 0.059REF 0.016 0.020 0.055 0.063 0.014 0.016 10TYP 0.028REF 4.400 4.600 4.050 4.250 1.700 1.900 1.300 1.500 2.400 2.600 0.890 1.200 3.00REF 1.50REF 0.400 0.520 1.400 1.600 0.350 0.410 10TYP 0.70REF
H
G I
A B C D E F G H I J K L M
B
F
E
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