|
|
PDF ISL80031A Data sheet ( Hoja de datos )
| Número de pieza | ISL80031A | |
| Descripción | 3A Synchronous Buck Converter | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ISL80031A (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
DATASHEET
3A Synchronous Buck Converter In 2x2 DFN Package
ISL80030, ISL80030A, ISL80031, ISL80031A
The ISL80030, ISL80030A, ISL80031 and ISL80031A are highly
efficient, monolithic, synchronous step-down DC/DC converters
that can deliver up to 3A of continuous output current from a 2.7V
to 5.5V input supply. They use peak current mode control
architecture to allow very low duty cycle operation. They operate
at either a 1MHz or 2MHz switching frequency, thereby providing
superior transient response and allowing for the use of small
inductors. They have excellent stability.
The ISL80030, ISL80030A, ISL80031 and ISL80031A integrate
very low rDS(ON) MOSFETs in order to maximize efficiency. In
addition, since the high-side MOSFET is a PMOS, the need for a
Boot capacitor is eliminated, thereby reducing external
component count. They can operate at 100% duty cycle.
The ISL80031, ISL80031A configured for PFM discontinuous
conduction operation, provides high efficiency by reducing
switching losses at light loads.
ISL80030, ISL80030A configured for PWM pulse width
modulation operation, provides a fast transient response,
which helps reduce the output noise and RF interference.
These devices are offered in a space saving 8 pin 2mmx2mm
DFN lead-free package with exposed pad for improved thermal
performance. The complete converter occupies less than
64mm2 area.
Features
• VIN range 2.7V to 5.5V
• Up to 3A of output current
• Switching frequency is 1MHz or 2MHz (see Table 1 on page 3)
• 35µA quiescent current (ISL80031/A)
• Overcurrent and short-circuit protection
• Over-temperature/thermal protection
• Negative current protection
• Power-good and enable
• 100% duty cycle
• Internal soft-start and soft-stop
• VIN undervoltage lockout and VOUT overvoltage protection
• Up to 95% peak efficiency
Applications
• General purpose POL
• Industrial, instrumentation and medical equipment
• Telecom and networking equipment
• Game console
VIN
GND
+2.7V …+5.5V 1 VIN
C1
22µF
2 VIN
ISL80030/ISL80031
PHASE 8
PGND 7
L1
C2
22µF
+1.8V/3A
EN 3 EN
PGND 6
C3
22pF
R1
PG
4 PG
EPAD
FB
5
0.6V
200k 1%
R2
100k 1%
9
VOUT
GND
R1
=
R2
V---V--F--O--B--
– 1
(EQ. 1)
FIGURE 1. TYPICAL APPLICATION CIRCUIT CONFIGURATION
100
VOUT = 3.3V
93
87
80
VOUT = 1.8V
73
67
VOUT = 2.5V
60
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, ISL80031, VIN = 5V, TA = +25°C
July 20, 2015
FN8766.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL80030, ISL80030A, ISL80031, ISL80031A
Functional Block Diagram
SOSoFfTt-
START
27pF
200kΩ
SHUTDOWN
EN VREF
BANDGAP
EAMP
SHUTDOWN
-
3pF
+
FB
6kΩ
1.15*VREF
-
SSLlOoPpEe
COMP
+ OV
0.85*VREF
VIN
-
+
UV
5MΩ
PG
1ms
DELAY
+
COMP
-
OSCILLATOR
PWM/PFM
LOGIC
CONTROLLER
PROTECTION
HS DRIVER
+
OCP
-
+
SKIP
-
+
CSA
-
NEG CURRENT
SENSING
0.3V
-
SCP
+
ZERO-CROSS
SENSING
SHUTDOWN
100Ω
VIN
P
PHASE
N
PGND
FIGURE 3. FUNCTIONAL BLOCK DIAGRAM
Submit Document Feedback
5
FN8766.0
July 20, 2015
5 Page 
ISL80030, ISL80030A, ISL80031, ISL80031A
Typical Performance Curves (Continued)
PHASE 5V/DIV
PHASE 5V/DIV
VOUT 1V/DIV
VOUT 1V/DIV
VEN 5V/DIV
VEN 5V/DIV
PG 5V/DIV
500µs/DIV
FIGURE 16. SHUTDOWN AT NO LOAD (ISL80031A)
fSW = 2MHz, VIN = 5V, PFM, TA = +25°C
PG 5V/DIV
500µs/DIV
FIGURE 17. SHUTDOWN AT NO LOAD (ISL80030A)
fSW = 2MHz, VIN = 5V, PWM, TA = +25°C
VEN 5V/DIV
VOUT 1V/DIV
IL 2A/DIV
PG 5V/DIV
500µs/DIV
FIGURE 18. START-UP AT 3A LOAD (ISL80030A)
fSW = 2MHz, VIN = 5V, PWM, TA = +25°C
VEN 5V/DIV
VOUT 1V/DIV
IL 2A/DIV
PG 5V/DIV
500µs/DIV
FIGURE 19. SHUTDOWN AT 3A LOAD (ISL80030A)
fSW = 2MHz, VIN = 5V, PWM, TA = +25°C
VEN 5V/DIV
VOUT 1V/DIV
IL 2A/DIV
PG 5V/DIV
500µs/DIV
FIGURE 20. START-UP AT 3A LOAD (ISL80031A)
fSW = 2MHz, VIN = 5V, PFM, TA = +25°C
VEN 5V/DIV
VOUT 1V/DIV
IL 2A/DIV
PG 5V/DIV
1ms/DIV
FIGURE 21. SHUTDOWN AT 3A LOAD (ISL80031A)
fSW = 2MHz, VIN = 5V, PFM, TA = +25°C
Submit Document Feedback 11
FN8766.0
July 20, 2015
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ISL80031A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL80031 | 3A Synchronous Buck Converter | Intersil Corporation |
| ISL80031A | 3A Synchronous Buck Converter | Intersil Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |