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APL5312

2025-09-27 23:43:38 责编:小OO

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ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.Features

General Description

The APL5312 is an ultra low noise, low dropout linear regulator, which operates from 2.3V to 6V input voltage and delivers up to 300mA. Typical dropout voltage is only 290mV at 300mA loading. Designed for use in RF applications, the high PSRR 74dB and low noise 36µV RMS makes it an ideal choice.

Design with an internal P-channel MOSET pass element,the APL5312 maintains a low supply current, indepen-dent of the load current and dropout voltage. Other fea-tures include thermal-shutdown protection and current-limit protection to ensure specified output current and controlled short-circuit current. The APL5312 regulator comes in a miniature SOT-23-5 and SC-70-5 package.

Applications

•Wide Operating Voltage: 2.3V~6V

•Low Dropout Voltage: 290mV @ 3V/300mA •Fixed Output Voltages: 1.5V~3.5V with Step 100mV , 2.85V

•Guaranteed 300mA Output Current •High PSRR: 74dB before 10kHz

•Low Output Noise: 36µV RMS at 100Hz to 100kHz •Current-Limit Protection

•Controlled Short Circuit Current: 50mA •Over-Temperature Protection •Stable with 1µF Capacitor for Any Load •Excellent Load/Line Transient •SOT-23-5 and SC-70-5 Packages •

Lead Free and Green Devices Available

(RoHS Compliant)

•Cellular Phones

•Portable and Battery-Powered Equipment •Wireless LANs •

GPS

Pin Configuration

Ordering and Marking Information

Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J -STD-020C for MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight).

Package Code

B : SOT-23-5 S5 : SC-70-5

Operating Ambient Temperature Range I : -40 to 85o C Handling Code

TR : Tape & Reel Voltage Code

15 : 1.5V 30 : 3.0V Assembly Material

G : Halogen and Lead Free Device

APL5312

Handling Code Temperature Range Package Code Assembly Material Voltage Code

VIN GND SHDN

VOUT

APL5312

123

SOT-23-5/SC-70-5

SOT-23-5 packages

SC-70-5 packages

Ordering and Marking Information (Cont.)

Absolute Maximum Ratings (Note 1)

Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

Note 2 : θJA is measured with the component mounted on a high effective thermal conductivity test board in free air.Note 3 : When mounted on a (Copper foil area 50%, 45x45x1.6tmm) glass epoxy board.

Thermal Characteristics

3Electrical Characteristics

Unless otherwise noted these specifications apply over full temperature, V IN = V OUT +1V, C IN = C OUT = 1µ F, T A = -40 to 85°C. Typical values refer to T = 25°C.Note 4 : Dropout voltage definition: V IN

-V OUT when V OUT is 2% below the value of V OUT for V IN = V OUT +1V.

4Typical Operating Characteristics

Ambient Temperature (°C)

Q u i e s c e n t C u r r e n t (µA )

Output Current (mA)

Quiescent Current vs. Ambient Temperature

Quiescent Current vs. Output Current

Q u i e s c e n t C u r r e n t (µA )

6080100120

1401601800

100150200250

300

Quiescent Current vs. Input Voltage

Dropout Voltage vs.Output Current

020406080100120140160

180200Q u i e s c e n t C u r r e n t (µA )

Input Voltage (V)0

50100150200250300350400050100150200250300

Output Current (mA)

Dropout Voltage vs. Output Current

-40-1510356085

100

105

110

115

120

125

Output Current (mA)

D r o p o u t V o l t a g e (m V )

D r o p u t V o l t a g e (m v )

100150200250300

020

4060801.5

1.8

2.1 2.4 2.73

3.3

Output Voltage (V)

Shutdown Exit Delay

S h u t d o w n E x i t D e l a y (µs )

5Frequency (Hz)

P S R R (d B )

PSRR vs. Frequency

Input Voltage (V)

C u r r e n t L i m i t (m A )

Current Limit vs. Input Voltage

BP Capacitance (nF)

Output Noise vs. BP Capacitance

O u t p u t N o i s e (µV R M S )

Ambient Temperature (°C)

M a x i m u m P o w e r D i s s i p a t i o n (m W )

Maximun Power Dissipation vs. Ambient

Typical Operating Characteristics (Cont.)

-110

-20-100-90-80-70-60-50-40

-30400

420440460480500520

540560

501001502002503003504004500

255075100125

020406080100120140

160Region of Stable C OUT ESR vs. Load Current

C O U T E S R (Ω)

Output Current (mA)

050

100150200250300

0.01

0.1

10100

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6Time (0.1ms/div)

Time (50µs/div)Line Transient

Exiting Shutdown Waveform Time (0.1ms/div)

Entering Shutdown Delay

Typical Operating Characteristics (Cont.)

Load Transient Time (0.1ms/div)V IN =4.5V~5.5V

V OUT (50mV/div)

I OUT =10mA I OUT =100mA

C BP =10nF SHDN (1V/div)

V OUT (1V/div)

I OUT =100mA C BP =10nF SHDN (1V/div)

V OUT (1V/div)

V OUT

(50mV/div)

I OUT (1~300mA)T r

=1µs V IN

=4.5V~5.5V OUT (50mV/div)I OUT

=10mA I OUT (1~300mA)T r =1µs V OUT (50mV/div)I OUT =100mA

C BP =10nF

I OUT =100mA C BP

=10nF

7Block Diagram

Pin Description

Typical Application Circuit

SHDN VIN

VOUT

GND

Application Information

Bypass Capacitor

Shutdown

The APL5312 has an active high enable function. Force SHDN high (>1.6V) enables the V OUT , SHDN low (<0.4V) dis-ables the V OUT . Enter the shutdown mode, it also causes the output voltage to discharge through a 500Ω resis-tance to ground. In shutdown mode, the quiescent cur-Output Voltage Selection

The APL5312 are supplied with factory-set output volt-ages from 1.5V to 3.5V.

Capacitor Selection and Regulation Stability

The APL5312 uses at least a 1µF capacitor on the input.This capacitor can use Aluminum, Tantalum, or Ceramic capacitors. Input capacitor with large value and low ESR provides better PSRR and line-transient response. The output capacitor also can use Aluminum, Tantalum, or Ceramic capacitor, and its proper values is at least 1µF,ESR must be above 25m Ω. Large output capacitor val-ues can reduce noise and improve load-transient response, stability, and PSRR. With X5R and Y5V dielectrics, 1µF is sufficient at all operating temperatures.The selection of output capacitor’s is important because it with C OUT form a zero to provide the sufficient phase margin (see the Figure C OUT ESR vs. Load Current).Use a 10nF bypass capacitor at BP for low-output voltage noise. The leakage current going into the BP pin should be less than 10nA. Increasing the capacitance slightly decreases the output noise. Value above 0.1µF and be-low 1nF are not recommended (see the Figure Output Noise vs. BP Capacitance).

Noise, PSRR, and Load-Transient Response

The APL5312 is designed to deliver ultra-low noise and high PSRR, as well as low dropout and low quiescent currents in battery–powered systems. When operating from sources other than batteries, improve PSRR and transient response can be achieved by increasing input and output capacitors, and bypass capacitor to form the passive filtering techniques (see Output Noise vs. BP Capacitance).rent can reduce to 0.1µA. The SHDN pin cannot be floating,a floating SHDN pin may cause an indeterminate state on the output. If it is no use, connect to V IN for normal operation.

Input-Output (Dropout) Voltage

The minimum input-output voltage differential (dropout)determines the lowest usable supply voltage. The drop-out voltage is a function of drain-to-source on resistance multiplied by the load current.Current Limit

APL5312 includes a current-limit circuitry for linear regulator. The current-limit protection, which senses the current flowing to the P-channel MOSFET, and controls the output voltage. The point where limiting occurs is I OUT =500mA. The output can be shortened to the ground for an indefinite amount of time without damaging to the part.

Thermal Protection

Thermal protection limits total power dissipation in the APL5312. When the junction temperature exceeds +160°C, the thermal sensor generates a logic signal to turn off the pass element and let IC to cool. When the IC’s junction temperature cools down by 20°C, the thermal sensor will turn the pass element on again, resulting in a pulsed output during continuous thermal protection. Ther-mal protection is designed to protect the IC in the event of fault conditions.

Operating Region and Power Dissipation

The thermal resistance of the case and circuit board,ambient and junction air temperature, and the rate of air flow all control the APL5312’s maximum power dissipation. The power dissipation across the device is P = I OUT (V IN -V OUT ). The maximum power dissipation is:

P MAX = (T J - T A ) / (θJC + θCA )θJA = θJC + θCA

where T J - T A is the temperature difference between the junction and ambient air.

θJC is the thermal resistance of the package, θCA is the thermal resistance through the printed circuit board, cop-per traces, and other materials to the surrounding air, θJA

9Application Information (Cont.)

Recommended Minimum Footprint

Operating Region and Power Dissipation (Cont.)is the thermal resistance between Junction and ambient air. For continual operation, do not exceed the absolute maximum junction Temperature rating of T J = 125°C.For example:

The SOT-23-5 package has maximum power dissipa-tion 300mW at T A = 55°C, relatively 225mW at SC-70-5package (see Maximum Power Dissipation vs. Ambient Temperature).

V IN = 5V, I OUT = 250mA, V OUT = 3.3V,P D = (5-3.3)V x 150mA = 255mW

According the power dissipation issue, we should adapt the SOT-23-5 package. It could reduce the thermal resistance to maintain the IC longer life.

The GND pin provides an electrical connection to the ground and channeling heat away. The printed circuit board (PCB) forms a heat sink and dissipates most of the heat into ambient air.

Unit : Inch

SOT-23-5

SC-70-5

Package Information

SOT-23-5

MAX.0.0570.0510.0240.0060.0090.0200.012L 0.300

e e1E1E D c b 0.080.300.600.0120.95 BSC 1.90 BSC 0.220.500.037 BSC 0.075 BSC

0.003MIN.

MILLIMETERS S Y M B O L A1A2A 0.000.90SOT-23-5

MAX.1.450.151.30MIN.0.0000.035INCHES

8°

0°8°

VIEW A

GAUGE PLANE SEATING PLANE

SEE VIEW A

1.40

2.60 1.80

3.002.70 3.100.1220.071

0.1180.1020.055

0.106Note : 1. Follow JEDEC TO-178 AA.

2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side.

11Package Information

SC-70-5

S Y M B O L MIN.MAX.1.100.000.080.250.10A A1c D E E1e e1L MILLIMETERS

b 0.150.300.65 BSC SC-70-5

0.150.45

0.026 BSC MIN.MAX.INCHES

0.0430.0000.0310.0400.0030.0100.0060.0180

0o 8o

0.004A20.80 1.000.006

0.0121.30 BSC

0.051 BSC

1.90

2.200.0750.0872.00 2.401.15

1.35

0.0790.0950.045

0.053

0.800.031Note : 1. Followed from JEDEC MO-223 AB.

2. Dimension D and E1 do not include mold flash, protrusions or gate burrs.

Mold flash, protrusion or gate burrs shall not exceed 6 mil per side.

VIEW A

GAUGE PLANE

SEATING PLANE

SEE VIEW A

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Carrier Tape & Reel Dimensions

SECTION B-B

SECTION A-A

(mm)

Devices Per Unit

13Taping Direction Information

SC-70-5

SOT-23-5

USER DIRECTION OF FEED

14Classification Profile

Classification Reflow Profiles

15Classification Reflow Profiles (Cont.)

Table 1. SnPb Eutectic Process – Classification Temperatures (Tc)

Reliability Test Program

Customer Service

Anpec Electronics Corp.Head Office :

No.6, Dusing 1st Road, SBIP,Hsin-Chu, Taiwan, R.O.C.Tel : 886-3-52000Fax : 886-3-52050

Taipei Branch :

2F, No. 11, Lane 218, Sec 2 Jhongsing Rd.,Sindian City, Taipei County 23146, Taiwan Tel : 886-2-2910-3838Fax : 886-2-2917-3838下载本文

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