DIODES AP7335A-XXSN-7

AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Description
Pin Assignments
NEW PRODUCT
The AP7335A is a 300mA, 5.0V fixed output voltage, low
dropout linear regulator with ±1% output voltage accuracy.
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 35μA. Built-in current-limit and thermal-shutdown
functions prevent IC from damage in fault conditions.
This device is only available as 5.0V fixed version. Please
contact your local sales office for any other voltage options.
The AP7335A is packaged in SOT25 and DFN2020-6.
•
•
•
Applications
•
•
•
•
•
•
•
Features
Smart Phones
MP3/MP4
Battery-powered devices
Bluetooth headset
Battery Charger
LCD TV
Multifunction Monitors
•
•
•
•
•
•
•
•
•
•
Note:
300mA Low Dropout Regulator with EN
Very low IQ 35µA
Fixed output at 5.0V
o VIN MIN 5.5V
High PSRR: 65dB at 1kHz
Fast start-up time 220µs
Stable with low ESR, 1µF 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 -40ºC to 85°C
SOT25, and DFN2020-6 Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
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.
Typical Application Circuit
V IN
V OUT
IN
OUT
AP7335
1uF
Enable
1uF
EN
GND
Fixed Output
AP7335A
Document number: DS35267 Rev. 2 - 2
1 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Pin Descriptions
NEW PRODUCT
Pin Number
Pin Name
SOT25
(fixed)
DFN2020-6
(fixed)
IN
GND
EN
ADJ
NC
OUT
1
2
3
4
5
3
2
1
5, 6
4
Description
Voltage input pin. Bypass to ground through at least 1µF MLCC capacitor
Ground
Enable input, active high
Output feedback pin
No connection
Voltage output pin. Bypass to ground through 1µF MLCC capacitor
Functional Block Diagram
IN
EN
OUT
Gate
Driver
Current Limit
and Thermal
Shutdown
R
0.8V
R
GND
Fixed Version
AP7335A
Document number: DS35267 Rev. 2 - 2
2 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Absolute Maximum Ratings
Ratings
Unit
ESD HBM
Symbol
Human Body Model ESD Protection
2000
V
ESD MM
Machine Model ESD Protection
200
V
VIN
Parameter
Input Voltage
OUT, EN Voltage
Continuous Load Current per Channel
NEW PRODUCT
TST
TJ
6.5
V
VIN + 0.3
V
Internal Limited
Storage Temperature Range
-65 to 150
°C
150
°C
Maximum Junction Temperature
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional
operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by
exposure to absolute maximum rating conditions for extended periods of time.
Recommended Operating Conditions
Symbol
Input voltage (Note 3)
IOUT
Output Current (Note 2)
TA
Notes:
Parameter
VIN
Operating Ambient Temperature
Min
Max
Unit
2 (Note 3)
6
V
0
300
mA
-40
85
°C
2. The device maintains a stable, regulated output voltage without a load current.
3. VIN(MIN) = 5.5V for 5.0V, VOUT at 300mA IOUT
AP7335A
Document number: DS35267 Rev. 2 - 2
3 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Electrical Characteristics
o
(TA = 25 C, VIN = 5.5 to 6V, CIN = 1μF, COUT = 1μF, VEN = 2V, unless otherwise stated)
Symbol
Parameter
Test Conditions
o
NEW PRODUCT
VOUT
Output Voltage Accuracy
ΔVOUT
/ΔVIN/V
Line Regulation
ΔVOUT
/VOUT
Load Regulation
Min
Typ.
Max
Unit
1
%
0.20
%/V
0.6
%
o
TA = -40 C to 85 C,
IOUT = 10% of IOUT-Max
-1
VIN = 5.5V to 6V,
0.02
VEN = VIN, IOUT = 1mA
VIN = 5.5V to 6V,
IOUT = 1mA to 300mA
-0.6
IOUT = 300mA
150
200
mV
IQ
Input Quiescent Current
VEN = VIN, IOUT = 0mA
35
80
μA
ISHDN
Input Shutdown Current
VEN = 0V, IOUT = 0mA
0.1
1
μA
Input Leakage Current
VEN = 0V, OUT grounded
0.1
1
μA
VDROPOUT Dropout Voltage (Note 4)
ILEAK
tST
Start-up Time
PSRR
PSRR
ISHORT
Short-circuit Current
VEN = 0V to 2.0V in 1μs,
IOUT = 300mA
VIN = 5.5VDC + 0.5VppAC,
f = 1kHz, IOUT = 50mA
220
μs
65
dB
160
mA
650
mA
VIN = VIN-Min to VIN-Max,
ILIMIT
Current limit
VOUT < 0.2V (fixed) or
VIN = VIN-Min to VIN-Max,
VOUT/ROUT = 1.2A
400
VIL
EN Input Logic Low Voltage
VIN = VIN-Min to VIN-Max
VIH
EN Input Logic High Voltage
VIN = VIN-Min to VIN-Max
1.4
IEN
EN Input Current
VIN = 0V or VIN-Max
-1
TSHDN
Thermal shutdown threshold
THYS
Thermal shutdown hysteresis
θJA
Notes:
Thermal Resistance Junction-to-Ambient
0.4
V
V
μA
1
145
°C
15
°C
SOT25 (Note 5)
187
DFN2020-6 (Note 5)
251
o
C/W
4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 1% below its nominal value.
5. Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout.
AP7335A
Document number: DS35267 Rev. 2 - 2
4 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
NEW PRODUCT
Typical Performance Characteristics
Start-Up Time
Start-Up Time
VEN=0 to 2V (1V/div)
VIN=5.5V
CIN=COUT=1μF
VEN=0 to 2V (1V/div)
VIN=5.5V
CIN=COUT=1μF
VOUT=5.0V (2V/div)
with no load
VOUT=5.0V (2V/div)
with 300mA load
Time (40μs/div)
Time (40μs/div)
Line Transient Response
Line Transient Response
VIN=5.5V to 6.0V (1V/div)
Tr=Tf=2μs
CIN=none, COUT=1μF
VIN=5.5V to 6.0V (1V/div)
Tr=Tf=2μs
CIN=none, COUT=1μF
VOUT=5.0V (10mV/div)
VOUT=5.0V (10mV/div)
IOUT=300mA(200mA/div)
IOUT=30mA(50mA/div)
Time (40μs/div)
Time (40μs/div)
Load Transient Response
Load Transient Response
VIN=VEN=5.5V
CIN=COUT=1μF
Tr=Tf=1μs
VIN=VEN=5.5V
CIN=COUT=1μF
Tr=Tf=1μs
VOUT=5.0V (100mV/div)
VOUT=5.0V (100mV/div)
IOUT=10mA to 150mA (200mA/div)
IOUT=10mA to 300mA (200mA/div)
Time (100μs/div)
Time (100μs/div)
AP7335A
Document number: DS35267 Rev. 2 - 2
5 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics (cont.)
PSRR
Dropout Voltage vs Output Current
200
80
IOUT=50mA
VOUT=5.0V
Dropout Voltage(mV)
70
PSRR(dB)
50
40
30
VIN=5.5V+0.5VppAC
VOUT=5.0V
CIN=none, COUT=1μF
TA=25°C
20
10
IOUT=300mA
150
90°C
100
25°C
50
-45°C
0
0
0.1
1
10
Frequency(kHz)
0
100
50
100
150
200
Output Current(mA)
250
300
Current limit vs Temperature
Short-circuit Current vs Temperature
800
200
VIN=5.5V
175
Current limit(mA)
Short-circuit Current(mA)
NEW PRODUCT
60
150
125
700
600
500
VIN=5.5V
VOUT=5.0V
400
100
-50
-25
0
25
50
75
Temperature(℃ )
AP7335A
Document number: DS35267 Rev. 2 - 2
100
125
-50
-25
0
25
50
75
100
125
Temperature(℃ )
6 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Input Capacitor
Current Limit Protection
A 1μF 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.
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
650mA to prevent over-current and to protect the
regulator from damage due to overheating.
Output Capacitor
The output capacitor is required to stabilize and improve
the transient response of the LDO. The AP7335A is stable
with very small ceramic output capacitors. Using a ceramic
capacitor value that is at least 1μF with ESR > 15mΩ 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.
Region of Stable COUT ESR vs. Load Current
100
Short Circuit Protection
When OUT pin is short-circuit to GND, short circuit
protection will be triggered and clamp the output current
to approximately 160mA. This feature protects the
regulator from over-current and damage due to
overheating.
Thermal Shutdown Protection
Thermal protection disables the output when the junction
temperature rises to approximately +145°C, allowing the
device to cool down. When the junction temperature
reduces to approximately +130°C 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.
Unstable Range
10
COUT ESR (Ω)
NEW PRODUCT
Application Note
Ultra Fast Start-up
1
After enabled, the AP7335A is able to provide full power
in as little as tens of microseconds, typically 220µs,
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.
VIN=5.5V
CIN=COUT=1μF
stable Range
0.1
0.01
Unstable Range
Fast Transient Response
0.001
0
50
100
150
200
250
300
Load Current (mA)
No Load Stability
No minimum load is required to keep the device stable.
The device will remain stable and regulated in no load
condition.
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 100µA 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.
ON/OFF Input Operation
The AP7335A 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.
AP7335A
Document number: DS35267 Rev. 2 - 2
The AP7335A’s fast transient response from 0 to 300mA
provides stable voltage supply for fast DSP and GSM
chipset with fast changing load.
Low Quiescent Current
The AP7335A, consuming only around 35µA for all input
range, provides great power saving in portable and low
power applications.
7 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Application Note (cont.)
NEW PRODUCT
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:
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 following equation:
PD = (VIN - VOUT) X IOUT
PD ([email protected]) = ( +145°C - TA )
R θJA
Ordering Information
AP7335A - XX XX - X
Output
50 : 5.0V
Package
Packing
SN : DFN2020-6
7 : Tape & Reel
AP7335A - XX X - X
Output
50 : 5.0V
Device
W : SOT25
Package Code
Packaging
(Note 6)
W
SN
SOT25
DFN2020-6
AP7335A-XXW-7
AP7335A-XXSN-7
Note:
Package
Packing
7 : Tape & Reel
7”/13” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
3000/Tape & Reel
-7
-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.
AP7335A
Document number: DS32259 Rev. 2 - 2
8 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Marking Information
(1) SOT25
7
( Top View )
5
4
XX Y W X
NEW PRODUCT
1
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 : G = Green
Device
Package
Identification Code
AP7335A-50
SOT25
TP
(2) DFN2020-6
( Top View )
XX
Y WX
Device
AP7335A-50
AP7335A
Document number: DS35267 Rev. 2 - 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 : G = Green
Package
DFN2020-6
9 of 12
www.diodes.com
Identification Code
TP
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Package Outline Dimensions (cont.)
NEW PRODUCT
(1) Package Type: SOT25
0.57/0.63
(2) Package Type: DFN2020-6
Marking
0.15max.
0.05 C
0.15 C
B
Seating plane
C
Top View
0.65
0.37
1.95/2.075
1.45/1.65
0.15
2x
0/0.05
0.08 C
A
0.15 C
0.65nom.
CL
0.2/0.3
Document number: DS35267 Rev. 2 - 2
0.37
0.9
1.67
0.05 M C A B
Bottom View
AP7335A
CL
0.15
0.30/0.40
CL
1
R0.
2x-
0.76/0.96
1.95/2.075
Pin#1 ID
0.45
CL
10 of 12
www.diodes.com
Land Pattern Recommendation
(Unit:mm)
July 2011
© Diodes Incorporated
AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Taping Orientation (Note 7)
NEW PRODUCT
For DFN2020-6
Note:
7. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
AP7335A
Document number: DS35267 Rev. 2 - 2
11 of 12
www.diodes.com
July 2011
© Diodes Incorporated
AP7335A
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).
NEW PRODUCT
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.
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 © 2011, Diodes Incorporated
www.diodes.com
AP7335A
Document number: DS35267 Rev. 2 - 2
12 of 12
www.diodes.com
July 2011
© Diodes Incorporated