Datasheet - Diodes Incorporated

AP7335A
300mA, LOW QUIESCENT CURRENT,
FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
Description
Pin Assignments
The AP7335A is a 300mA, 3.3V and 5.0V fixed output voltage, lowdropout linear regulator with ±1% output voltage accuracy. The
device includes 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.
IN 1
5 OUT
GND 2
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.
EN 3
4 NC
SOT25
(Fixed Output)
EN 1
6 NC
GND 2
5 NC
IN 3
4 OUT
U-DFN2020-6
(Fixed Output)
This device is only available as a 5.0V fixed version. Please contact
your local sales office for any other voltage options.
The AP7335A is packaged in SOT25 and U-DFN2020-6.
Features
Applications

300mA Low Dropout Regulator with EN

Smart Phones

Very low IQ 35µA

MP3/MP4s

Fixed output at 3.3V and 5.0V

Battery-Powered Devices
-

Bluetooth Headsets
VIN MIN 5.5V

High PSRR: 65dB at 1kHz

Battery Chargers

Fast start-up time 220µs

LCD TVs

Stable with low ESR, 1µF ceramic output capacitor

Multifunction Monitors

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 U-DFN2020-6 Available in “Green” Molding
Compound (No Br, Sb)

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP7335A
Document number: DS35267 Rev. 4 - 2
1 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Typical Applications Circuit
VIN
VOUT
IN
OUT
AP7335
1uF
Enable
1uF
EN
GND
Fixed Output
Pin Descriptions
Package Name
Pin Number
SOT25
Function
(fixed)
U-DFN2020-6
(fixed)
IN
1
3
Voltage input pin. Bypass to ground through at least 1µF MLCC capacitor
GND
2
2
Ground
EN
3
1
Enable input, active high
ADJ
-
-
Output feedback pin
NC
4
5, 6
OUT
5
4
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. 4 - 2
2 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
Symbol
VIN
Vout,Enable
ILimit
TST
Parameter
Input Voltage
Storage Temperature Range
ESD HBM
Human Body Model ESD Protection
ESD MM
Machine Model ESD Protection
Unit
6.5
V
VIN + 0.3
V
Internal Limited
mA
-65 to +150
°C
2,000
V
200
V
OUT, EN Voltage
Continuous Load Current per Channel
Ratings
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 (@TA = +25°C, unless otherwise specified.)
Symbol
Input voltage (Note 5)
IOUT
Output Current (Note 4)
TA
Notes:
Parameter
VIN
Operating Ambient Temperature
Min
Max
Unit
2 (Note 5)
6
V
0
300
mA
-40
+85
°C
4. The device maintains a stable, regulated output voltage without a load current.
5. VIN(MIN) = 5.5V for 5.0V, VOUT at 300mA IOUT.
AP7335A
Document number: DS35267 Rev. 4 - 2
3 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Electrical Characteristics
(@TA = +25°C, unless otherwise specified.)
(TA = +25°C, VIN = 5.5 to 6V, CIN = 1μF, COUT = 1μF, VEN = 2V, unless otherwise stated)
Symbol
VOUT
Parameter
Output Voltage Accuracy
VOUT
/VIN/V
Line Regulation
VOUT
/VOUT
Load Regulation
VDROPOUT Dropout Voltage (Note 6)
Test Conditions
Min
Typ.
Max
Unit
-1
-
1
%
-
0.02
0.20
%/V
-0.6
-
0.6
%
IOUT = 300mA
-
150
200
mV
TA = -40°C to +85°C,
IOUT = 10% of IOUT-Max
VIN = 5.5V to 6V,
VEN = VIN, IOUT = 1mA
VIN = 5.5V to 6V,
IOUT = 1mA to 300mA
IQ
Input Quiescent Current
VEN = VIN, IOUT = 0mA
-
35
80
μA
ISHDN
Input Shutdown Current
VEN = 0V, IOUT = 0mA
-
0.1
1
μA
ILEAK
Input Leakage Current
VEN = 0V, OUT grounded
-
0.1
1
μA
TST
Start-Up Time
-
220
-
μs
-
65
-
dB
-
160
-
mA
400
650
-
mA
0.4
V
PSRR
PSRR
ISHORT
Short-Circuit Current
ILIMIT
Current Limit
VEN = 0V to 2.0V in 1μs,
IOUT = 300mA
VIN = 5.5VDC + 0.5VppAC,
f = 1kHz, IOUT = 50mA
VIN = VIN-Min to VIN-Max,
VOUT < 0.2V (fixed) or
VIN = VIN-Min to VIN-Max,
VOUT/ROUT = 1.2A
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
-
1
μA
TSHDN
Thermal Shutdown threshold
-
-
+145
-
C
THYS
Thermal Shutdown hysteresis
-
-
+15
-
°C
SOT25 (Note 7)
-
187
-
U-DFN2020-6 (Note 7)
-
251
-
θJA
Notes:
Thermal Resistance Junction-to-Ambient
V
°C/W
6. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.
7. 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. 4 - 2
4 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Performance Characteristics
Start-Up Time
Start-Up Time
VEN=0 to 2V (1V/div)
VIN=5.5V
CIN=COUT=1μF
VOUT=5.0V (2V/div)
with no load
VEN=0 to 2V (1V/div)
VIN=5.5V
CIN=COUT=1μF
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 300mA (200mA/div)
IOUT=10mA to 150mA (200mA/div)
Time (100μs/div)
Time (100μs/div)
AP7335A
Document number: DS35267 Rev. 4 - 2
5 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Performance Characteristics (continued)
PSRR
Dropout Voltage vs Output Current
200
80
Dropout Voltage(mV)
70
PSRR(dB)
60
50
40
30
20
150
100
50
10
0
0
0.1
1
10
Frequency(kHz)
0
100
100
150
200
Output Current(mA)
250
300
Current limit vs Temperature
200
800
175
700
Current limit(mA)
Short-circuit Current(mA)
Short-circuit Current vs Temperature
50
150
125
100
600
500
400
-50
-25
0
25
50
75
Temperature(℃)
AP7335A
Document number: DS35267 Rev. 4 - 2
100
125
-50
-25
0
25
50
75
100
125
Temperature(℃)
6 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Application Note
Input Capacitor
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.
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
COUT ESR (Ω)
10
Stable Range
1
VIN=5.5V
CIN=COUT=1μF
0.1
Unstable Range
0.01
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.
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 V IL 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 650mA to prevent overcurrent 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 160mA. This
feature protects the regulator from overcurrent 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.
AP7335A
Document number: DS35267 Rev. 4 - 2
7 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Application Note
Ultra Fast Start-Up
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.
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 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.
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.
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 following equation:
PD ([email protected]) =
( 145C - TA )
R JA
Ordering Information
Note:
Device
Package Code
AP7335A-XXW5-7
AP7335A-XXSN-7
Packaging
7”/13” Tape and Reel
(Note 8)
Quantity
Part Number Suffix
W5
SOT25
3,000/Tape & Reel
-7
SN
U-DFN2020-6
3,000/Tape & Reel
-7
8. 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: DS35267 Rev. 4 - 2
Device
Package
Identification Code
AP7335A-33W5-7
SOT25
TN
AP7335A-50W5-7
SOT25
TP
AP7335A-33SN-7
U-DFN2020-6
TN
AP7335A-50SN-7
U-DFN2020-6
TP
8 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Marking Information
(1)
SOT25
(Top View)
4
7
5
XX Y W X
1
(2)
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
U-DFN2020-6
(Top View)
XX
Y WX
AP7335A
Document number: DS35267 Rev. 4 - 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
9 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(1)
Package Type: SOT25
A
SOT25
Dim Min Max Typ
A
0.35 0.50 0.38
B
1.50 1.70 1.60
C
2.70 3.00 2.80
D

 0.95
H
2.90 3.10 3.00
J
0.013 0.10 0.05
K
1.00 1.30 1.10
L
0.35 0.55 0.40
M
0.10 0.20 0.15
N
0.70 0.80 0.75
0°
8°


All Dimensions in mm
B C
H
K
J
(2)
M
N
L
D
Package Type: U-DFN2020-6
A1
A3
A
Seating Plane
D
D2
D2/2
R0
E E2
0
.10
E2/2
Pin #1 ID
U-DFN2020-6
Dim Min Max Typ
A
0.57 0.63 0.60
A1
0
0.05 0.03
A3
0.15
b
0.20 0.30 0.25
D
1.95 2.075 2.00
D2 1.45 1.65 1.55
e
0.65
E
1.95 2.075 2.00
E2 0.76 0.96 0.86
L
0.30 0.40 0.35
All Dimensions in mm
L
e
AP7335A
Document number: DS35267 Rev. 4 - 2
b
10 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
Package Type: SOT25
C2
Z
C2
C1
G
Dimensions Value (in mm)
Z
3.20
G
1.60
X
0.55
Y
0.80
C1
2.40
C2
0.95
Y
X
Package Type: U-DFN2020-6
X
C
G
Y
Dimensions
Y1
C
G
X
X1
Y
Y1
G
Value
(in mm)
0.65
0.15
0.37
1.67
0.45
0.90
X
X1
AP7335A
Document number: DS35267 Rev. 4 - 2
11 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
For U-DFN2020-6
Note:
9. 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. 4 - 2
12 of 13
www.diodes.com
August 2015
© Diodes Incorporated
AP7335A
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.
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.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
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 © 2015, Diodes Incorporated
www.diodes.com
AP7335A
Document number: DS35267 Rev. 4 - 2
13 of 13
www.diodes.com
August 2015
© Diodes Incorporated