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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Description
The AP7335 is a 300mA, adjustable and fixed output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. 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 35A. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. This device is available with adjustable output from 0.8V to 5.0V, and fixed version with 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 3.9V outputs. Please contact your local sales office for any other voltage options. The AP7335 is available in SOT25 and DFN2020-6 packages.
Pin Assignments
(Top View)
IN 1 GND 2 EN 3 4 NC 5 OUT
NEW PRODUCT
SOT25 (Fixed Output)
(Top View)
IN 1 GND 2 EN 3 4 ADJ 5 OUT
Features
SOT25 (Adj Output)
* * * * * * * * * * * * * * * 300mA Low Dropout Regulator with EN Very low IQ: 35A Wide input voltage range: 2V to 6V Wide adjustable output: 0.8V to 5.0V Fixed output options: 0.8V to 3.9V (0.1V step size possible) High PSRR: 65dB at 1kHz Fast start-up time: 220s Stable with low ESR, 1F ceramic output capacitor Excellent Load/Line Transient Response Low dropout: 150mV at 300mA Current limit and short circuit protection Thermal shutdown protection Ambient temperature range: -40C to 85C SOT25, and DFN2020-6: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1)
(Top View)
EN 1 GND 2 IN 3 6 NC 5 NC 4 OUT
DFN2020-6 (Fixed Output)
(Top View)
EN 1 GND 2 6 ADJ 5 NC 4 OUT
Applications
IN 3
* * * *
Smart Phones MP3/MP4 Battery-powered devices Bluetooth headset
DFN2020-6 (Adj Output)
Notes:
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. 1 of 18 www.diodes.com
AP7335
Document number: DS32259 Rev. 1 - 2
July 2010
(c) Diodes Incorporated
AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Application Circuit
V IN
IN OUT
V OUT
V IN
IN OUT
V OUT
AP7335
1uF Enable EN G ND ADJ
R1 1uF
AP7335
1uF Enable EN GND 1uF
R2
NEW PRODUCT
Adjustable O utput
Fixed Output
R VOUT = VREF 1 + 1 where R 2 80K R2
Pin Descriptions
Pin Name IN GND EN ADJ NC OUT Pin Number SOT25 (fixed) 1 2 3 4 5 SOT25 (adj) 1 2 3 4 5 DFN2020-6 (fixed) 3 2 1 5, 6 4 DFN2020-6 (adj) 3 2 1 6 5 4 Description Voltage input pin. Bypass to ground through at least 1F MLCC capacitor Ground Enable input, active high Output feedback pin No connection Voltage output pin. Bypass to ground through 1F MLCC capacitor
AP7335
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Functional Block Diagram
IN
Current Limit and Thermal Shutdown
OUT
IN
Current Limit and Thermal Shutdown
OUT
EN
Gate Driver
EN
R
Gate Driver
NEW PRODUCT
ADJ
0.8V
R
0.8V
GND
GND
Fixed Version
Adjustable Version
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, EN Voltage Continuous Load Current per Channel Storage Temperature Range Maximum Junction Temperature Ratings 2000 200 6.5 VIN + 0.3 Internal Limited -65 to 150 150 Unit V V V V C C
TST TJ
Recommended Operating Conditions
Symbol VIN IOUT TA
Notes:
Parameter Input voltage Output Current (Note 2) Operating Ambient Temperature
Min 2 0 -40
Max 6 300 85
Unit V mA C
2 The device maintains a stable, regulated output voltage without a load current.
AP7335
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Electrical Characteristics
(TA = 25oC, VIN = VOUT +1V, CIN = 1F, COUT = 1F, VEN = 2V, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max ADJ Reference Voltage (Adjustable version) IOUT= 0mA 0.8 VREF ADJ Leakage (Adjustable version) 0.1 1 IADJ TA = -40oC to 85oC, -2 2 VOUT Output Voltage Accuracy IOUT = 10% of IOUT-Max VIN = (VOUT +1V) to VIN-Max, VOUT Line Regulation 0.02 0.20 VEN = VIN, IOUT = 1mA /VIN/V VIN = (VOUT +1V) to VIN-Max, VOUT Load Regulation -0.6 0.6 IOUT = 1mA to 300mA /VOUT VOUT < 2.5V, IOUT = 300mA 170 300 VDropout Dropout Voltage (Note 3) VOUT 2.5V, IOUT = 300mA 150 200 Input Quiescent Current VEN = VIN, IOUT = 0mA 35 80 IQ VEN = 0V, IOUT = 0mA 0.1 1 ISHDN Input Shutdown Current Input Leakage Current VEN = 0V, OUT grounded 0.1 1 ILEAK VEN = 0V to 2.0V in 1s, 220 Start-up Time tST IOUT = 300mA VIN = [VOUT +1V]VDC + 0.5VppAC, 65 PSRR PSRR (Note 4) f = 1kHz, IOUT = 50mA VIN = VIN-Min to VIN-Max, 140 VOUT < 0.2V (fixed) or ISHORT Short-circuit Current 25% of VOUT (ADJ version) VIN = VIN-Min to VIN-Max, 400 600 Current limit ILIMIT VOUT/ROUT = 1.2A EN Input Logic Low Voltage VIN = VIN-Min to VIN-Max 0.4 VIL EN Input Logic High Voltage VIN = VIN-Min to VIN-Max 1.4 VIH EN Input Current VIN = 0V or VIN-Max -1 1 IEN 145 TSHDN Thermal shutdown threshold Thermal shutdown hysteresis 15 THYS SOT25 (Note 5) 187 Thermal Resistance Junction-to-Ambient JA DFN2020-6 (Note 5) 251
Notes:
Unit V A % %/V % mV A A A s dB mA mA V V A C C
o
NEW PRODUCT
C/W
3. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. 4. At VIN < 2.3V, the PSRR performance may be reduced. 5. Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout.
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics
Start-Up Time Start-Up Time
VEN=0 to 2V (1V/div) VIN=5V CIN=COUT=1F
VEN=0 to 2V (1V/div) VIN=5V CIN=COUT=1F
NEW PRODUCT
VOUT=3.3V (1V/div) with no load
VOUT=3.3V (1V/div) with 300mA load
Time (40s/div) Line Transient Response
Time (40s/div) Line Transient Response
VIN=4.3V to 5.3V (1V/div) Tr=Tf=2s CIN=none, COUT=1F VOUT=3.3V (20mV/div)
VIN=4.3V to 5.3V (1V/div) Tr=Tf=2s CIN=none, COUT=1F VOUT=3.3V (20mV/div)
IOUT=30mA (50mA/div)
IOUT=300mA(200mA/div)
Time (40s/div)
Time (40s/div)
AP7335
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued)
Load Transient Response Load Transient Response
VOUT=1.8V (100mV/div) VIN=VEN=2.8V CIN=COUT=1F Tr=Tf=1s
VOUT=1.8V (100mV/div) VIN=VEN=2.8V CIN=COUT=1F Tr=Tf=1s
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IOUT=10mA to 150mA (200mA/div)
IOUT=10mA to 300mA (200mA/div)
Time (100s/div) Load Transient Response
Time (100s/div) Load Transient Response
VOUT=3.3V (100mV/div) VIN=VEN=4.3V CIN=COUT=1F Tr=Tf=1s
VOUT=3.3V (100mV/div) VIN=VEN=4.3V CIN=COUT=1F Tr=Tf=1s
IOUT=10mA to 150mA (200mA/div)
IOUT=10mA to 300mA (200mA/div)
Time (100s/div)
Time (100s/div)
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued)
PSRR
PSRR
80 70 60 PSRR(dB)
PSRR(dB)
80
IOUT=50mA
70 60
IOUT=50mA
50 40 30 20 10 0 0.1
IOUT=300mA VIN=2.25V+0.5VppAC VOUT=0.8V CIN=none, COUT=1F TA=25C
50 40 30 20 10 0 0.1
IOUT=300mA VIN=2.25V+0.5VppAC VOUT=1.2V CIN=none, COUT=1F TA=25C
NEW PRODUCT
1 10 Frequency(kHz)
100
1 10 Frequency(kHz)
100
PSRR
PSRR
80 70 60 PSRR(dB)
80
IOUT=50mA
70 60
IOUT=50mA
IOUT=300mA VIN=2.8V+0.5VppAC VOUT=1.8V CIN=none, COUT=1F TA=25C
PSRR(dB)
50 40 30 20 10 0 0.1
50 40 30 20 10 0
IOUT=300mA VIN=4.3V+0.5VppAC VOUT=3.3V CIN=none, COUT=1F TA=25C
1 10 Frequency(kHz)
100
0.1
1 10 Frequency(kHz)
100
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued)
Input Quiescent current vs Input Voltage
Input Quiescent Current vs Temperature 60 Input Quiescent Current(A)
60
Input Quiescent current(A)
50 40 30 20 10 0 4
TA=25C VOUT=3.3V IOUT=0mA
50 40 30 20 10 0
VIN=VEN=4.3V VOUT=3.3V IOUT=0mA
NEW PRODUCT
4.5
5 5.5 Input Voltage(V)
6
-50
-25
0
25 50 75 Temperature( )
100
125
Load Regulation 0.2
0.08
Line Regulation
Output Variation(%/V)
VIN=VEN=4.3V VOUT=3.3V
Output Variation(%) 0.1
0.04
90C
-45C
-45C
0.0
25C
0.00
-0.1
-0.04
25C VOUT=3.3V IOUT=1mA
90C
-0.2 0 50 100 150 200 Output Current(mA) 250 300
-0.08 4
4.5
5 5.5 Input Voltage(V)
6
AP7335
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued)
Dropout Voltage vs Output Current 250
250
Dropout Voltage vs Output Current
VOUT=1.8V
Dropout Voltage(mV)
VOUT=3.3V 90C 25C
Dropout Voltage(mV) 200
200 150 100
90C
150
NEW PRODUCT
25C
100 50
-45C
50 0 0 50 100 150 200 Output Current(mA) 250 300
-45C
0 0 50 100 150 200 250 300 Output Current(mA)
ADJ Reference Voltage vs Temperature 0.82 ADJ Reference Voltage(V)
Short-circuit Current vs Temperature 160 Short-circuit Current(mA)
0.81
VIN=4.3V IOUT=0mA
VIN=4.3V
150
0.80
140
0.79
130
0.78 -50 -25 0 25 50 75 Temperature( ) 100 125
120 -50 -25 0 25 50 75 Temperature( ) 100 125
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued)
Current limit vs Temperature 700 675 Current limit(mA) 650 625 600 575 550 -50 -25 0 25 50 75 Temperature( ) 100 125
NEW PRODUCT
VIN=4.3V VOUT=3.3V
AP7335
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Application Note
Input Capacitor A 1F ceramic capacitor is recommended between IN 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 reduce noise. For PCB layout, a wide copper trace is required for both IN and GND pins. A lower ESR capacitor type allows the use of less capacitance, while higher ESR type requires more capacitance. Output Capacitor The output capacitor is required to stabilize and improve the transient response of the LDO. The AP7335 is stable with very small ceramic output capacitors. Using a ceramic capacitor value that is at least 1F with ESR > 15m on the output ensures stability. Higher capacitance values help to improve line and load transient response. The output capacitance may be increased to keep low undershoot and overshoot. Output capacitor must be placed as close as possible to OUT and GND pins.
NEW PRODUCT
Region of Stable COUT ESR vs. Load Current 100
Unstable Range
10 COUT ESR () 1
Stable Range
VIN=4.3V CIN=COUT=1F
0.1 0.01
Unstable Range
0.001 0 50 100 150 200 250 300 Load Current (mA)
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Application Note (Continued)
Adjustable Operation The AP7335 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below.
V IN
IN OUT
V OUT
A P 7335
1uF
R1 1u F
NEW PRODUCT
E n a b le
EN GND
ADJ R2
The output voltage is calculated by:
R VOUT = VREF 1 + 1 R 2
Where VREF=0.8V (the internal reference voltage) Rearranging the equation will give the following that is used for adjusting the output to a particular voltage:
V R1 = R2 OUT - 1 V REF
To maintain the stability of the internal reference voltage, R2 need to be kept smaller than 80k.
No Load Stability Other than external resistor divider, no minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition. ON/OFF Input Operation The AP7335 is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used, the EN pin should be tied to IN pin to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. 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. Short Circuit Protection When OUT pin is short-circuit to GND, short circuit protection will be triggered and clamp the output current to approximately 140mA. This feature protects the regulator from over-current and damage due to overheating.
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Application Note (Continued)
Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +145C, allowing the device to cool down. When the junction temperature reduces to approximately +130C 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 enabled, the AP7335 is able to provide full power in as little as tens of microseconds, typically 220s, 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. Fast Transient Response Fast transient response LDO can 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 LDO.
The AP7335's fast transient response from 0 to 300mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load.
NEW PRODUCT
Low Quiescent Current The AP7335, consuming only around 35A for all input range, provides great power saving in portable and low power applications. Wide Output Range The AP7335, with a wide output range of 0.8V to 5.0V, provides a versatile LDO solution for many portable applications. Power Dissipation The device power dissipation and proper sizing of the thermal plane that is connected to the thermal pad is critical to avoid thermal shutdown and ensure reliable operation. Power dissipation of the device depends on input voltage and load conditions and can be calculated by:
PD = (VIN - VOUT) X IOUT The maximum power dissipation, handled by the device, depends on the maximum junction to ambient thermal resistance, maximum ambient temperature, and maximum device junction temperature, which can be calculated by the equation in the following: PD (max@TA) =
( +145C - TA ) R JA
AP7335
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Ordering Information
AP7335 - XX XX G - X
Output Blank : ADJ 08 : 0.8V 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 39 : 3.9V
Device
Package W : SOT25 SN : DFN2020-6
Green
Packing 7 : Tape & Reel
G : Green
NEW PRODUCT
AP7335-XXWG-7 AP7335-XXSNG-7
Notes:
Package Code W SN
Packaging (Note 6) SOT25 DFN2020-6
7"/13" Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7
6. 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.
AP7335
Document number: DS32259 Rev. 1 - 2
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Marking Information
(1) SOT25
( Top View ) 5 4 XX Y W X 1
Device AP7335-ADJ AP7335-08 AP7335-10 AP7335-12 AP7335-15 AP7335-18 AP7335-20 AP7335-25 AP7335-28 AP7335-30 AP7335-33 AP7335-39
7
NEW PRODUCT
2
3
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
Package SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25
Identification Code ZA ZB ZC ZD ZE ZF ZG ZH ZJ ZK ZM ZN
(2) DFN2020-6
( Top View ) XX Y WX
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
Package DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6
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Device AP7335-ADJ AP7335-08 AP7335-10 AP7335-12 AP7335-15 AP7335-18 AP7335-20 AP7335-25 AP7335-28 AP7335-30 AP7335-33 AP7335-39
Identification Code ZA ZB ZC ZD ZE ZF ZG ZH ZJ ZK ZM ZN
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AP7335
Document number: DS32259 Rev. 1 - 2
AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Package Outline Dimensions (Continued)
(1) Package Type: SOT25
NEW PRODUCT
(2) Package Type: DFN2020-6
0.57/0.63
Marking
0.15max.
0.05 C 0.08 C
Seating plane
C
0/0.05
0.15 C
Top View
0.37 0.65 0.15 0.45
C L C L
2x
B
1.95/2.075 1.45/1.65
C L
A
0.30/0.40
1.95/2.075
0.76/0.96
C L
2x-
0.15 C
0.37
0.65nom.
0.2/0.3
1.67
0.05 M C A B
Bottom View
Land Pattern Recommendation (Unit:mm)
AP7335
Document number: DS32259 Rev. 1 - 2
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0.15
0.9
Pin#1 ID
1 R0.
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Taping Orientation (Note 7)
For DFN2020-6
NEW PRODUCT
Notes:
7. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
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AP7335
300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator
IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages.
NEW PRODUCT
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright (c) 2010, Diodes Incorporated www.diodes.com
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