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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Features
* * * * * * * * * * * * * * * 300mA Low Dropout Regulator in 3-pin package Very low IQ over full load: 65A Wide input voltage range: 2V to 6V Fixed output options: 1.0V to 3.3V PSRR: 65dB typical at 100Hz Fast start-up time: 80s Stable with low ESR, 1F ceramic output capacitor Excellent Load/Line Transient Response Low dropout: 300mV typical at 300mA Current limit protection Short circuit protection Thermal shutdown protection Ambient temperature range: -40C to 85C SOT23 and SOT23R: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1)
Description
The AP7333 is a 300mA, fixed output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The characteristics of low dropout voltage and low quiescent current make it suitable for low power applications, for example, battery powered devices. The typical quiescent current is approximately 65A. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7333 is available in SOT23 packages with different pin-outs.
Applications
* * * * * XDSL Router Wireless LAN Cards Desktop and Notebook Computers Battery Powered Equipments Mouse, Keyboards
Typical Application Circuit
VIN
IN AP7333 1uF GND OUT
VOUT
1uF
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Ordering Information
AP7333 - XX XX G - 7
Output 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 20 : 2.0V 25 : 2.5V 28 : 2.8V 30 : 3.0V 33 : 3.3V
Device AP7333-XXSAG-7 AP7333-XXSRG-7
Notes:
Package SA : SOT23 SR : SOT23R
Green
Packing 7 : Tape & Reel
G : Green
Package Code SA SR
Packaging (Note 2) SOT23 SOT23R
7" Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
Pin Assignment
(1) SOT23 (1) SOT23R
( Top View ) IN 1 3 GND OUT 2 OUT 2
( Top View )
GND 1 3 IN
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Pin Descriptions
Pin Number SOT23 SOT23R 1 2 3 3 2 1
Pin Name IN OUT GND
Description Voltage input pin. Bypass to ground through at least 1F capacitor Voltage output pin. Bypass to ground through 1F ceramic capacitor Ground
Functional Block Diagram
IN
C urre nt Lim it and T herm a l S hutdow n
OUT
G ate D river
R
V REF
R
GND
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN TOP TST PD TJ Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage Continuous Load Current Operating Junction Temperature Range Storage Temperature Range SOT23 Power Dissipation (Note 3) SOT23R Maximum Junction Temperature Ratings 6 400 7 Internal Limited -40 ~ 125 -65 ~150 600 540 150 Units kV V V C C mW mW C
Recommended Operating Conditions
Symbol VIN IOUT TA
Notes:
Parameter Input voltage Output Current (Note 4) Operating Ambient Temperature
Min 2 0 -40
Max 6 300 85
Unit V mA C
3. Ratings apply to ambient temperature at 25C 4. The device maintains a stable, regulated output voltage without a load current.
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Electrical Characteristics
(TA = 25 C, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, unless otherwise stated)
o
Symbol
Test Conditions Min Typ. Max Unit IOUT = 0mA 55 75 Input Quiescent Current A IQ IOUT = 300mA 65 85 IOUT = 300mA 300 550 mV VDropout Dropout Voltage (Note 5) TA = -40oC to 85oC, -2 2 % VOUT Output Voltage Accuracy IOUT = 30mA VOUT VIN = (VOUT +1V) to VIN-Max, 0.01 0.20 %/V Line Regulation IOUT = 1mA /VIN/V VIN = (VOUT +1V) to VIN-Max, VOUT Load Regulation -0.6 0.6 % IOUT from 1mA to 300mA /VOUT VIN = 0V to 2.0V, VOUT = 1V, Start-up Time 80 s tST IOUT = 300mA VIN = [VOUT +1V]VDC + 0.5VppAC, 65 dB PSRR PSRR f = 100Hz, IOUT = 30mA VIN = VIN-Min to VIN-Max, 100 mA ISHORT Short-circuit Current VOUT < 0.2V Current Limit VOUT/ROUT = 1A 400 600 mA ILIMIT Thermal Shutdown Threshold 140 TSHDN C Thermal Shutdown Hysteresis 15 THYS C o SOT23 (Note 6) 207 C/W Thermal Resistance Junction-to-Ambient JA o SOT23R (Note 6) 230 C/W
5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. This parameter only applies to output voltages above 1.8V. 6. Test conditions for SOT23 and SOT23R: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, single sided.
Parameter
Notes:
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Typical Performance Characteristics
Quiescent Current vs Input Voltage Iload=0mA
Output Voltage Variation (%/V)
60 58 56 54 52 50 48 2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6
Line Regulation (% /V)
0.1
Vout=2.5V 90
90
0.06
Output Current (mA)
0.02
-0.02
25
-45
-0.06
Vout=2.5V Vin=Vout +1V
3.5 4 4.5
25
-45
-0.1 5 5.5 6
Input Voltage (V)
Input Voltage (V)
Load Regulation (% )
0.6
Dropout Voltage
350
Output Voltage Variation (%)
Dropout Voltage (mV)
0.4
-45
300 250 200 150 100 50 0
Vout=2.5V
90
0.2
0
-0.2
25
-0.4
25
-45
Vout=2.5V Vin=Vout +1V
0 50 100 150
90
200 250 300
-0.6
0
50
100
150
200
250
300
Output Current (mA)
Output Current (mA)
Short Circuit vs Input Voltage
105 100 95 90 85 80 75 3.5 4 4.5 5 5.5 6
Current Limit vs Input Voltage
600
Vout=2.5V
Output Current (mA)
Current Limit (mA)
-45
550
Ta=25 Vout=2.5V
500
450
25
90
400 3.5 4 4.5 5 5.5 6
Input Voltage (V)
Input Voltage (V)
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Typical Performance Characteristics
(Continued)
PSRR
75 70 65
75 70
PSRR
PSRR (dB)
55 50 45 40 35 0.1 1 10 100
PSRR (dB)
60
Vout=1V Vin=2V Cin=Cout=1uF Ta=25
65 60 55 50 45 40 35 0.1 1
Vout=2.5V Vin=3.5V Cin=Cout=1uF Ta=25
10
100
Frequency (kHz)
Frequency (kHz)
Line Transient Response
Line Transient Response
Vin=3V to 2V (1V/div)
Vin=2V to 3V (1V/div)
Tr=10us
Tr=10us
Vout=1V (50mV/div)
Vout=1V (50mV/div)
Iout=300mA (300mA/div)
Iout=300mA (300mA/div)
Time (50us/div)
Time (50us/div)
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Typical Performance Characteristics
Load Transient Response
Tr=Tf=10us Vin=2V Vout=1V (100mV/div)
(Continued)
Load Transient Response
Tr=Tf=10us Vin=3.5V Vout=2.5V (100mV/div)
Iout=1mA to 300mA (100mA/div)
Iout=1mA to 300mA (100mA/div)
Time (200us/div) Start-Up Time (No Load)
Time (200us/div) Start-Up Time (300mA Load)
Vin=0 to 3.5V (1V/div) Cin=Cout=1uF
Vin=0 to 3.5V (1V/div) Cin=Cout=1uF
Vout=2.5V (1V/div)
Vout=2.5V (1V/div)
Iout (300mA/div)
Time (50us/div)
Time (50us/div)
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Application Note
Input Capacitor
A 1F ceramic capacitor is recommended to connect between VIN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both VIN and GND. A lower ESR capacitor allows the use of less capacitance, while higher ESR type requires more capacitance. to cool down. When the junction temperature reduces to approximately +125C the output circuitry is enabled again. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the heat dissipation of the regulator, protecting it from damage due to overheating.
Ultra Fast Start-up
After turned on, the AP7333 is able to provide full power in as little as tens of microseconds, typically 80s, without sacrificing low ground current. This feature will help load circuitry move in and out of standby mode in real time, eventually extend battery life for mobile phones and other portable devices.
Output Capacitor
The output capacitor is required to stabilize and help transient response for LDO. The AP7333 is stable with very small ceramic output capacitors. The recommended capacitance is from 1F to 4.7F, Equivalent Series Resistance (ESR) is from 10m to 200m, and temperature characteristic is X7R or X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be increased to keep low undershoot/overshoot. Place output capacitor as close as possible to OUT and GND pins, and keep the leads as short as possible.
Fast Transient Response
Fast transient response LDOs can also extend battery life. TDMA-based cell phone protocols such as Global System for Mobile Communications (GSM) have a transmit/receive duty factor of only 12.5 percent, enabling power savings by putting much of the baseband circuitry into standby mode in between transmit cycles. In baseband circuits, the load often transitions virtually instantaneously from 100A to 100mA. To meet this load requirement, the LDO must react very quickly without a large voltage drop or overshoot -- a requirement that cannot be met with conventional, general-purpose LDOs. The AP7333's fast transient response from 0 to 300mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load.
No Load Stability
No minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition.
Current Limit Protection
When output current at OUT pin is higher than current limit threshold, the current limit protection will be triggered and clamp the output current to approximately 600mA to prevent over-current and to protect the regulator from damage due to overheating.
Small Overshoot and Undershoot
The AP7333 has small and controlled overshoot and undershoot in load and line transitions. This helps to protect supplied circuit from damage and operation error caused by glitches. This feature also permits the usage of small value output decoupling capacitor with AP7333.
Short Circuit Protection
When OUT pin is short-circuit to GND or OUT pin voltage is less than 200mV, short circuit protection will be triggered and clamp the output current to approximately 100mA. This feature protects the regulator from over-current and damage due to overheating.
Low Quiescent Current
The AP7333, consuming only around 65A for all input range and output loading, provides great power saving in portable and low power applications.
Thermal Shutdown Protection
Thermal protection disables the output when the junction temperature rises to approximately +140C, allowing the device
Wide Output Options
The AP7333, with multiples of fixed output voltage options, provides a versatile LDO solution for many portable applications.
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Marking Information
(1) SOT23 and SOT23R
( Top View )
3 XX Y W X 1 2
XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green
Device AP7333-10SA AP7333-12SA AP7333-15SA AP7333-18SA AP7333-20SA AP7333-25SA AP7333-28SA AP7333-30SA AP7333-33SA AP7333-10SR AP7333-12SR AP7333-15SR AP7333-18SR AP7333-20SR AP7333-25SR AP7333-28SR AP7333-30SR AP7333-33SR
Package SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R SOT23R
Identification Code JR JS JT JU JV JW JX JY JZ RA RB RC RD RE RF RG RH RJ
AP7333 Rev. 2
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AP7333
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
Package Information
(All Dimensions in mm)
(1) Package Type: SOT23 and SOT23R
AP7333 Rev. 2
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300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
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