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PDF AP3405 Data sheet ( Hoja de datos )
| Número de pieza | AP3405 | |
| Descripción | 600mA Step-down DC/DC Converter | |
| Fabricantes | Diodes | |
| Logotipo |  |
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AP3405
600mA Step-down DC/DC Converter with Synchronous Rectifier
Description
The AP3405 is a 2.0MHz fixed frequency, current mode, PWM
synchronous buck (step-down) DC-DC converter, capable of driving a
600mA load with high efficiency, excellent line and load regulation.
The high efficiency is easily configured by using an inductor, resistors
and capacitors as the external components. Current mode control
provides fast transient response and cycle-by-cycle current limit.
The AP3405 employs complete protection to ensure system security,
including input Undervoltage Lockout, Over-Temperature Protection
and hiccup mode Short Circuit Protection.
Pin Assignments
(Top View)
Pin 1 Mark
NC 1
NC 2
AGND 3
EP
This IC is available in U-DFN2020-8 package.
PGND 4
8 EN
7 FB
6 VIN
5 SW
U-DFN2020-8 (Type E)
Features
High-Efficiency Buck Power Converter
Input Voltage Range: 2.3V to 5.5V
Output Voltage Range: 0.7V to 5.5V
Fixed 2.0MHz Oscillator Frequency
Built-in Soft-Start Time
Built-in Overcurrent Protection
Built-in Thermal Shutdown Function
Built-in UVLO Function
Hiccup Mode SCP
Output Current: 600mA
Package: U-DFN2020-8 (Type E)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Post DC-DC Voltage Regulation
Mobile Phones and Wearable Devices
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.
Typical Applications Circuit
VIN
CIN
4.7μF
ON/OFF
L 2.2μH
6
VIN
5
SW
AP3405 FB 7
8 EN
AGND 3
PGND 4
R1
240KΩ
R2
120KΩ
VOUT 1.8V
Cff
22pF
COUT
10μF
AP3405
Document number: DS38093 Rev. 1 - 2
1 of 9
www.diodes.com
January 2016
© Diodes Incorporated
1 page  
Performance Characteristics (TA = +25°C, VIN = 3.6V, VOUT = 1.8V, unless otherwise specified.)
AP3405
Efficiency vs. Output Current
100
90
80
70
60
50
40
30 V = 1.8V
OUT
20
10
0
-50 0 50 100 150 200 250 300 350 400 450 500 550 600 650
Output Current (mA)
Output Voltage vs. Output Current
1.815
1.810
1.805
1.800
1.795
1.790
1.785
1.780
1.775
0
V = 3.6V
IN
100 200 300 400 500 600
Output Current (mA)
Supply Current vs. Input Voltage
50
48
46
44
42
40
38
36
34 V = 1.8V, I = 0A
OUT
OUT
32
30
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage (V)
PMOS RDSON vs. Temperature
440
420
400
380
360
340
320
300
280
260
240
-60 -40 -20
I = 100mA
SW
0 20 40 60 80
Temperature (OC)
100 120 140
Feedback Voltage vs. Temperature
0.68
0.66
0.64
0.62
0.60
0.58
0.56
0.54
0.52
0.50
-40
V = 3.6V, Test Mode
IN
-20 0 20 40 60 80
Temperature (oC)
100 120 140
NMOS RDSON vs. Temperature
360
340
320
300
280
260
240
220
200
180
-60 -40 -20
I = 100mA
SW
0 20 40 60 80
Temperature (OC)
100 120 140
AP3405
Document number: DS38093 Rev. 1 - 2
5 of 9
www.diodes.com
January 2016
© Diodes Incorporated
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AP3405.PDF ] | |
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