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PDF ISL8033A Data sheet ( Hoja de datos )
| Número de pieza | ISL8033A | |
| Descripción | Dual 3A Low Quiescent Current High Efficiency Synchronous Buck Regulator | |
| Fabricantes | Intersil | |
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Dual 3A Low Quiescent Current High Efficiency
Synchronous Buck Regulator
ISL8033, ISL8033A
ISL8033 is a dual integrated power controller rated for 3A per
channel with a 1MHz step-down regulator that is ideal for any low
power low-voltage applications. The ISL8033A offers 2.5MHz
operation for smaller more compacted design. The channels are
180° out-of-phase for input RMS current and EMI reduction. It is
optimized for generating low output voltages down to 0.8V each.
The supply voltage range is from 2.85V to 6V, allowing for the use
of a single Li+ cell, three NiMH cells or a regulated 5V input. It
has a guaranteed minimum output current of 3A each when ISET
is connected to VDD. The output current of each output is
selectable by setting ISET pin.
The ISL8033, ISL8033A includes a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
efficiency and minimize external component count. 100% duty-
cycle operation allows less than 250mV dropout voltage at 3A.
The ISL8033, ISL8033A offers an independent 1ms Power-Good
(PG) timer at power-up. When shutdown, ISL8033, ISL8033A
discharges the output capacitor. Other features include internal
digital soft-start, enable for power sequence, controllable soft-
stop output discharge during disabled, start-up with pre-biased
output, 100% maximum duty cycle for lowest dropout, 100%
duty cycle operation for smooth transition, less than 8µA logic
controlled shutdown current, independent enable, overcurrent
protection, and thermal shutdown.
The ISL8033, ISL8033A is offered in a 24 Ld 4mmx4mm QFN
package with 1mm maximum height. The complete converter
occupies less than 5.46cm2 area.
Features
• Dual 3A High Efficiency Synchronous Buck Regulator with up
to 95% Efficiency
• 2% Output Accuracy Over-Temperature/Load/Line
• Internal Digital Soft-Start - 1.5ms
• External Synchronization up to 6MHz (ISL8033)
• Internal Current Mode Compensation
• Peak Current Limiting and Hiccup Mode Short Circuit
Protection
• Adjustable Peak Overload Current
• Negative Current Protection
• Pb-Free (RoHS Compliant)
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Test and Measurement Systems
• Li-ion Battery Power Devices
• Bar Code Readers
Related Literature
• See AN1606, ISL8033EVAL1Z Application Note
• See AN1611, ISL8033EVAL2Z Application Note
100
90
80
70 3.3VOUT
60
50
400.0
VIN = 5V
0.5 1.0 1.5 2.0
IOUT (A)
FIGURE 1. EFFICIENCY vs LOAD
2.5
3.0
March 24, 2011
FN6854.2
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 Inc. 2010, 2011. 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.
Free Datasheet http://www.datasheet4u.com/
1 page  
ISL8033, ISL8033A
Pin Descriptions (Continued)
PIN NUMBER
18, 19
2, 3,
16, 17
25
SYMBOL
LX1
VIN2,
VIN1
PD
DESCRIPTION
Switching node connection for Channel 1. Connect to one terminal of inductor for VOUT1.
Input supply voltage. Connect a 22µF ceramic capacitor to power-ground per channel.
The exposed pad must be connected to the PGND pin for proper electrical performance. Add as much vias as
possible under this pad for optimal thermal performance.
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL8033IRZ*
80 33IRZ
-40 to +85
24 Ld 4x4 QFN
L24.4x4D
ISL8033AIRZ*
80 33AIRZ
-40 to +85
24 Ld 4x4 QFN
L24.4x4D
NOTES:
1. Add “-T*” suffix for tape and reel.Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-
free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL8033, ISL8033A. For more information on MSL, please see Technical
Brief TB363.
5 FN6854.2
March 24, 2011
Free Datasheet http://www.datasheet4u.com/
5 Page 
ISL8033, ISL8033A
Typical Operating Performance ISL8033
Unless otherwise noted, operating conditions are: TA = +25°C, VIN = 5V, EN = VIN, L1 = L2 = 1.5µH, C1 = C2 = C4 = 2x22µF, VOUT1 = 1.2V, VOUT2 = 1.8V,
IOUT1 = IOUT2 = 0A to 3A. (Continued)
EN2 2V/DIV
VOUT2 1V/DIV
IL2 1A/DIV
PG 2V/DIV
EN1 2V/DIV
VOUT1 0.5V/DIV
IL1 0.5A/DIV
PG 5V/DIV
FIGURE 21. SOFT-START AT FULL LOAD CHANNEL 2
FIGURE 22. SOFT-DISCHARGE SHUTDOWN CHANNEL 1
EN2 2V/DIV
LX1 2V/DIV
VOUT2 1V/DIV
IL2 0.5A/DIV
PG 5V/DIV
FIGURE 23. SOFT-DISCHARGE SHUTDOWN CHANNEL 2
SYNCH 5V/DIV
VOUT1 RIPPLE 20mV/DIV
IL1 0.2A/DIV
FIGURE 24. CHANNEL 1 STEADY STATE OPERATION AT NO LOAD
WITH FREQUENCY = 6MHz
LX2 2V/DIV
LX1 2V/DIV
SYNCH 5V/DIV
VOUT2 RIPPLE 20mV/DIV
IL2 0.2A/DIV
FIGURE 25. CHANNEL 2 STEADY STATE OPERATION AT NO LOAD
WITH FREQUENCY = 6MHz
11
SYNCH 5V/DIV
VOUT1 RIPPLE 20mV/DIV
IL1 2A/DIV
FIGURE 26. CHANNEL 1 STEADY STATE OPERATION AT FULL LOAD
WITH FREQUENCY = 6MHz
FN6854.2
March 24, 2011
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ISL8033A.PDF ] | |
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