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tm
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T6328A
500mA Low Dropout Voltage Regulator
FEATURES
* Wide Input Range: 2.5V to 5.5V * Available Output Voltages: 1.5V / 1.8V / 2.0V / 2.5V / 2.8V / 3.0V / 3.3V / 3.7V * Low-Noise for RF Application * Quick Start-Up (Typically 50us) * Fast Response in Line/Load Transient * Standby Current : <0.01uA * TTL-Logic-Controlled Shutdown Input * Low Temperature Coefficient * Current Limiting Protection * Thermal Shutdown Protection * High Power Supply Rejection Ratio * Only 1uF Output Capacitor Required for Stability * Available Package (Lead-Free) : SOT-23-3, SOT-23-5, SOT-223, SOT-89, SC-82
GENERAL DESCRIPTION
The T6328A is designed for portable RF and wireless applications with demanding performance and space requirements. The T6328A performance is optimized for batterypowered systems to deliver ultra low noise and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The T6328A also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The T6328A consumes less than 0.01uA in shutdown mode and has fast turn-on time less than 50us. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the SOT-23-3, SOT-23-5, SOT223, SC-82 and SOT -89 packages. PART NUMBER EXAMPLES
T 6 3 2 8 A -1 8 A X G
a
b
c
d
APPLICATIONS
* CDMA/GSM Cellular Handsets * Battery-Powered Equipment * Laptop, Palmtops, Notebook Computers * Hand-Held Instruments * PCMCIA Cards * Portable Information Appliances
a : Device Number b : Output Voltage 15=1.5V, 18=1.8V, 20=2.0V, 25=2.5V 28=2.8V, 30=3.0V, 33=3.3V, 37=3.7V c : Pin-out / function and Package AX=SOT-23-5(A), BX=SOT-23-5(B), CX=SOT-23-3(A), DX=SOT-89(A), EX=SOT-89(B), FX=SOT223(A), AU=SC-82(A) d : G=lead-free
TM Technology Inc. reserves the right to change products or specifications without notice.
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Publication Date: OCT. 2007 Revision: A
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VIN
GND EN
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T6328A
PIN ARRANGEMENT (Top view) SOT23-5(A) T6328A-XXAXG
1 2 3 4 NC 5
VOUT
SOT23-5(B) T6328A-XXBXG
EN
NC 1 2 3 4 5 VIN
SOT23-3(A) T6328A-XXCXG
GND VOUT
1 3 VIN 2
GND
VOUT
SOT-89(A) T6328A-XXDXG
1 2 3
SOT-89(B) T6328A-XXEXG
1 2 3
SOT-223(A) T6328A-XXFXG
1 2
GND
3
VOUT
VOUT
VOUT
SC-82(A) T6328A-XXAUG
EN GND
1 2 4 3 VIN
PIN DESCRIPTION
SYMBOL VOUT GND EN VIN NC Voltage output Ground pin DESCRIPTION
TM Technology Inc. reserves the right to change products or specifications without notice.
GND
VIN
GND
VIN
VIN
VOUT
Enable signal, high active
Input supply pin.
No connect
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Absolute Maximum Ratings
Supply Voltage ................................................................... -0.3V to 6V EN Pin Input Voltage ............................................................ -0.3V to 6V Operating Juction Temperature ................................................ -55C to +150C Operating temperature range ................................................... -40C to +125C Storage temperature range ...................................................... -65C to +150C Lead temperature (soldering, 10sec) .......................................... 260C Power Dissipation, PD @ TA = 25C : SOT-23-3/SOT-23-5...............................................................400mW SC-82 .............................................................................. 300mW SOT-89 / SOT-223 ...............................................................500mW Package Thermal Resistance : SOT-23-3/SOT-23-5, JA ............................................. ............250C/W SC-82, JA ............................................................ ...............333C/W SOT-89 /SOT-223, JA ............................................................ 200C/W ESD Susceptibility HBM (Human Body Mode) .........................................................2KV MM (Machine Mode) ............................................................ ...200V
Electrical Characteristics
( VIN = VOUT + 1V, TA = 25C, CIN = COUT = 1uF, unless otherwise noted )
Symbol VIN IOUT ILIM IQ Description Input Voltage Conditions Min. Typ. Max 2.5 500 600 65 3 10 650 780 5.5 +2 90 10 30 850 980 -2 1.2 f =100Hz f =10KHz Unit V % mA mA uA mV mV mV mV mV mV uA nA V V dB C C
VOUT Output Voltage Accuracy Output current Current Limit Quiescent Current
IOUT=1mA RLoad =1 ohm EN 1.2V, IOUT=0mA
VIN= VOUT +1V to 5.5V, IOUT =1mA 0.1mA< IOUT < 500mA VOUT=3.0~3.9V VOUT=2.5~2.9V VOUT=2.0~2.4V VOUT=1.4~1.9V
VLINE Line Regulation VLOAD Load Regulation
VDROP Dropout Voltage
IL=500mA
1100 1300 1400 1600 0.01 0 -60 -30 165 30 1 100 0.4 -
ISHDN Shutdown current IIBEN EN Input Bias Current VENH EN Input High Voltage VENL EN Input Low Voltage
EN = VIN EN = VIN or GND
PSRR Power Supply Rejection Rate COUT=1uF, IOUT =100mA
Thermal Shutdown Temperature TSD Thermal Shutdown Temperature Hysteresis
TSD TM Technology Inc. reserves the right to change products or specifications without notice. P. 3
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T6328A
Applications Information
Like any voltage regulator, the external capacitors used for the T6328A must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1uF on the T6328A input and the amount of capacitance can be increased without limit. The input capacitor must be located a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. Any good quality ceramic or tantalum can be used for this capacitor. The capacitor with larger value and lower ESR (equivalent series resistance) provides better PSRR and linetransient response. The output capacitor must meet both requirements for minimum amount of capacitance and ESR in all voltage regulator application. The T6328A is designed specifically to work with low ESR ceramic output capacitor in space-saving and performance consideration. Using a ceramic capacitor whose value is at least 1uF with ESR is more than 20m on the T6328A output ensures stability. The T6328A still works well with output capacitor of other types due to the wide stable ESR range. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability and PSRR.The output capacitor should be located with in 0.5 inch from the VOUT pin of the T6328A and returned to a clean analog ground.
Enable Function
The T6328A features an voltage regulator enable/disable function. To assure the T6328A voltage regulator will switch on, the EN turn on control level must be greater than 1.2V. The T6328A voltage regulator will go into shutdown mode when the voltage on the EN pin falls below 0.4V. The T6328A equips a quick-discharge function to protect the system. When the regulator is turned off by EN pin, the internal MOSFET between VOUT and GND will be turned on to discharge output voltage quickly. If the enable function is not needed in a specific application, it may be tied to GND/VIN to keep the voltage regulator in a continuously on state.
TM Technology Inc. reserves the right to change products or specifications without notice.
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T6328A
Thermal Considerations
Thermal protection limits power dissipation in T6328A. When the operating junction temperature exceeds 165C, the OTP circuit starts the thermal shutdown function and turns the pass element off. The pass element turns on again after the junction temperature cools by 30C. For continuous operation, do not exceed absolute maximum operatiog junction temperature 125C. The power dissipation definition in device is shown as following formula : PD = (VIN - VOUT) x IOUT + VIN x IQ The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : PD(MAX) = ( TJ(MAX) - TA ) / JA Where TJ(MAX) is the maximum operating junction temperature 125C, TA is the ambient temperature and the JA is the junction to ambient thermal resistance. For recommended operating conditions specification of T6328A, where TJ(MAX) is the maximum junction temperature of the die (125C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance JA is layout dependent) for SOT-23-3/SOT-23-5 package is 250C/W, SC-82 package is 333C/W, SOT-89/ SOT-223 package is 300C/W on standard JEDEC 51-3 thermal test board. The maximum power dissipation at TA = 25C can be calculated by following formula : PD(MAX) = (125C - 25C)/250 = 400mW (SOT-23-3/SOT-23-5) PD(MAX) = (125C - 25C)/333 = 300mW (SC-82) PD(MAX) = (125C - 25C)/200 = 500mW (SOT-89/ SOT-223) The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance JA For T6328A packages.
TM Technology Inc. reserves the right to change products or specifications without notice.
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T6328A
PACKAGE DIMENSIONS SOT-23-3
B B1 B2
A1 A
C1 C2
C F
I
D
H
G
E
Symbol A A1 B B1 B2 C C1 C2 D E F G H I
Min. 2.60 1.40 2.70
0.95 0.90 0 0.30 0.08
Dimension in mm Typ. 2.80 1.575 2.85 1.90(BSC) 0.95(BSC) 1.20 1.10 0.075 0.40 0.45 0.15 0.60(REF) 0~8X 5~15X
Max. 3.00 1.60 3.00
Min. 0.102 0.055 0.106
1.45 1.30 0.150 0.60 0.22
0.037 0.035 0 0.012 0.003
Dimension in inch Typ. 0.110 0.062 0.112 0.075(BSC) 0.037(BSC) 0.047 0.043 0.003 0.015 0.018 0.006 0.023(REF) 0~8X 5~15X
Max. 0.118 0.063 0.118
0.057 0.051 0.06 0.023 0.009
TM Technology Inc. reserves the right to change products or specifications without notice.
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Publication Date: OCT. 2007 Revision: A
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T6328A
PACKAGE DIMENSIONS SOT-23-5
B B1 B2
A1
A
C1 C2
C F
I
D
H
G
E
Symbol A A1 B B1 B2 C C1 C2 D E F G H I
Min. 2.60 1.40 2.70
0.95 0.90 0 0.30 0.08
Dimension in mm Typ. 2.80 1.575 2.85 1.90(BSC) 0.95(BSC) 1.20 1.10 0.075 0.40 0.45 0.15 0.60(REF) 0~8X 5~15X
Max. 3.00 1.60 3.00
Min. 0.102 0.055 0.106
1.45 1.30 0.150 0.60 0.22
0.037 0.035 0 0.012 0.003
Dimension in inch Typ. 0.110 0.062 0.112 0.075(BSC) 0.037(BSC) 0.047 0.043 0.003 0.015 0.018 0.006 0.023(REF) 0~8X 5~15X
Max. 0.118 0.063 0.118
0.057 0.051 0.06 0.023 0.009
TM Technology Inc. reserves the right to change products or specifications without notice.
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Publication Date: OCT. 2007 Revision: A
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T6328A
PACKAGE DIMENSIONS SC-82
B B1
A1
A
D
D1
C1 C2
C F
I
H
G
E
Symbol A A1 B B1 C C1 C2 D D1 E F G H I
Min. 1.80 1.15 1.80 0.80 0.80 0.00 0.15 0.35 0.20 0.08
Dimension in mm Typ. 1.30(BSC) 0.65(REF) 0~8X 5~15X
Max. 2.45 1.35 2.20 1.10 1.00 0.10 0.40 0.50 0.46 0.26
Min. 0.071 0.045 0.071 0.031 0.031 0.000 0.006 0.014 0.008 0.003
Dimension in inch Typ. 0.051(BSC) 0.025(REF) 0~8X 5~15X
Max. 0.096 0.053 0.087 0.043 0.039 0.004 0.016 0.020 0.018 0.010
TM Technology Inc. reserves the right to change products or specifications without notice.
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T6328A
PACKAGE DIMENSIONS SOT-89
D D1 POLISHED(2X)
E 1 2 B 3 L
H
B1 10'(2X)
C
A e e1
Symbol A B B1 C D D1 E H e e1 L
Dimension in mm Min. Max. 1.40 1.60 0.44 0.56 0.36 0.48 0.35 0.44 4.40 4.60 1.35 1.83 2.29 2.60 3.94 4.25 1.50 BSC 3.00 BSC 0.89 1.2
Dimension in inch Min. Max. 0.055 0.063 0.017 0.022 0.014 0.019 0.013 0.017 0.173 0.181 0.053 0.072 0.090 0.102 0.155 0.167 0.059 BSC 0.118 BSC 0.035 0.047
TM Technology Inc. reserves the right to change products or specifications without notice.
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Publication Date: OCT. 2007 Revision: A
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T6328A
PACKAGE DIMENSIONS SOT-223
B B1
A1 A
e
e1
C1 C2 D
C
F
H
E
Symbol A A1 B B1 C C1 C2 D E e e1 F H
Min. 6.70 3.30 6.30 2.90 1.50 0.02 0.66 0.75 0.23
Dimension in mm Typ. 7.00 3.50 6.50 3.00 1.60 0.70 2.30 4.6 0.30 0~10X
Max. 7.30 3.70 6.70 3.10 1.80 1.70 0.10 0.84 0.35
Min. 0.263 0.129 0.248 0.114 0.059 0.001 0.025 0.029 0.009
Dimension in inch Typ. 0.275 0.137 0.255 0.118 0.062 0.027 0.090 0.181 0.011 0~10X
Max. 0.287 0.145 0.263 0.122 0.70 0.066 0.003 0.033 0.013
TM Technology Inc. reserves the right to change products or specifications without notice.
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Publication Date: OCT. 2007 Revision: A

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