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PDF AP3428 Data sheet ( Hoja de datos )
| Número de pieza | AP3428 | |
| Descripción | 1A STEP-DOWN DC-DC BUCK CONVERTER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP3428 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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AP3428/A
1.5MHZ, 1A STEP-DOWN DC-DC BUCK CONVERTER
Description
The AP3428/A is a 1A step-down DC-DC converter. At heavy load,
the constant-frequency PWM control performs excellent stability and
transient response. No external compensation components are
required.
The AP3428/A supports a range of input voltages from 2.5V to 5.5V,
allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH
cell, and other standard power sources. The output voltage is
adjustable from 0.6V to the input voltage. The AP3428/A employs
internal power switch and synchronous rectifier to minimize external
part count and realize high efficiency. During shutdown, the input is
disconnected from the output and the shutdown current is less than
1μA. Other key features include over-temperature and short circuit
protection, and under-voltage lockout to prevent deep battery
discharge.
The AP3428/A delivers 1A maximum output current while consuming
only 40μA of no-load quiescent current. Ultra-low RDS(ON) integrated
MOSFETs and 100% duty cycle operation make the AP3428/A an
ideal choice for high output voltage, high current applications which
require a low dropout threshold. Pulse skip mode allows to maintain
high efficiency at light-load conditions.
Pin Assignments
(Top View)
EN 1
5 FB
GND 2
LX 3
4 VIN
TSOT25 for AP3428
(Top View)
VIN 1
5 LX
GND 2
EN 3
4 FB
The AP3428/A is available in TSOT25, U-DFN2020-6 (Type J)
packages.
Features
Output Current: Up to 1A
Output Voltage: 0.6V to VIN
Input Voltage: 2.5V to 5.5V
0.6V Reference Voltage With ±2% Precision
40µA (Typ) No Load Quiescent Current
Shutdown Current: <1µA
100% Duty Cycle Operation
1.5MHz Switching Frequency
Internal Soft Start
No External Compensation Required
Current Limit Protection
Thermal Shutdown
TSOT25, U-DFN2020-6 (Type J) Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
TSOT25 for AP3428A
(Top View)
P in 1 Mark
NC 1
6 FB
EN 2
5 GND
VIN 3
4 LX
U-DFN2020-6 (Type J)
Applications
Post DC-DC Voltage Regulation
Set Top Boxes
Notebook Computer
PAD
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.
AP3428/A
Document number: DS37417 Rev. 2 - 2
1 of 13
www.diodes.com
June 2016
© Diodes Incorporated
1 page  
AP3428/A
Electrical Characteristics (@TA = +25ºC, VIN = 5.0V, VOUT = 2.5V, COUT = 10µF, L = 2.2µH, unless otherwise specified.)
Symbol
VIN
VOUT
IQ
ISD
VFB
IFB
ILIM
fOSC
RDS(ON)
RDISCH
VENH
VENL
IEN
VUVLO
VHYS
TOTP
TOTH
tSS
Parameter
Input Voltage Range
Output Voltage Range
Quiescent Current
Shutdown Current
Regulated Feedback Voltage
FB Leakage Current
Peak Inductor Current
Oscillator Frequency
Drain-Source On-State
Resistance
Output Discharge Switch On
Resister
EN Threshold High
EN Threshold Low
EN Leakage Current
Input UVLO Threshold
UVLO Hysteresis
Over Temperature Protection
OTP Hysteresis
Soft-start Time
Condition
–
–
VFB = 0.65V
VEN = 0V
–
VFB = 1V
–
–
ISW = 100mA High Side
ISW = 100mA Low Side
–
–
–
VIN= VEN =5V
–
–
–
–
–
Min
2.5
0.6
–
–
0.588
–
1.3
–
–
–
–
1.5
–
-1.0
–
–
–
–
–
Typ
–
–
40
0.1
0.6
–
–
1.5
250
170
2.1
–
–
–
2.4
0.1
+160
+15
2
Max
5.5
VIN
–
1
0.612
0.2
–
–
–
–
–
–
0.4
1.0
2.7
–
–
–
–
Unit
V
V
µA
µA
V
µA
A
MHz
mΩ
mΩ
KΩ
V
V
µA
V
V
°C
°C
ms
AP3428/A
Document number: DS37417 Rev. 2 - 2
5 of 13
www.diodes.com
June 2016
© Diodes Incorporated
5 Page 
Package Outline Dimensions
(1) Package Type: TSOT25
E1/2
E1
A
D
e1 01(4x)
E/2
Ec
Gauge Plane
0 Seating Plane
L
L2
eb
01(4x)
A2
A1
Seating Plane
AP3428/A
TSOT25
Dim Min Max Typ
A - 1.00 -
A1 0.01 0.10 -
A2 0.84 0.90 -
b 0.30 0.45 -
c 0.12 0.20 -
D - - 2.90
E - - 2.80
E1 -
- 1.60
e 0.95 BSC
e1 1.90 BSC
L 0.30 0.50
L2 0.25 BSC
θ 0° 8° 4°
θ1 4° 12° -
All Dimensions in mm
(2) Package Type: U-DFN2020-6 (Type J)
A A1
E2/2
E E2
D
D2
D2/2
A3
Seating Plane
R0.100
L
eb
U-DFN2020-6
(Type J)
Dim Min Max Typ
A 0.50 0.60 --
A1 0.00 0.05 0.03
A3 --
-- 0.203
b 0.20 0.30 0.25
D 1.95 2.075 2.00
D2 1.45 1.65 1.55
E 1.95 2.075 2.00
E2 0.76 0.96 0.86
e 0.65 BSC
L 0.30 0.40 0.35
All Dimensions in mm
AP3428/A
Document number: DS37417 Rev. 2 - 2
11 of 13
www.diodes.com
June 2016
© Diodes Incorporated
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AP3428.PDF ] | |
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