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PDF ISL8013 Data sheet ( Hoja de datos )
| Número de pieza | ISL8013 | |
| Descripción | 3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISL8013 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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3SNyAORTEnCRLOEcMCohOMwMErNMoDEEQNnDIDSoEuRLD8Eu0iPF1eLO3sAARsCNBEcEMeWuENnDcTEtkPSAIGCRNRTSuergruenlatt1orMHz High Efficiency
ISL8013
The ISL8013 is a high efficiency, monolithic, synchronous
step-down DC/DC converter that can deliver up to 3A
continuous output current from a 2.7V to 5.5V input
supply. It uses a current control architecture to deliver
very low duty cycle operation at high frequency with fast
transient response and excellent loop stability.
The ISL8013 integrates a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
efficiency and minimize external component count. The
100% duty-cycle operation allows less than 300mV
dropout voltage at 3A output current. High 1MHz
pulse-width modulation (PWM) switching frequency
allows the use of small external components and SYNC
input enables multiple ICs to synchronize out of phase to
reduce ripple and eliminate beat frequencies.
The ISL8013 can be configured for discontinuous or
forced continuous operation at light load. Forced
continuous operation reduces noise and RF interference
while discontinuous mode provides high efficiency by
reducing switching losses at light loads.
Fault protection is provided by internal hiccup mode
current limiting during short circuit and overcurrent
conditions, an output over voltage comparator and
over-temperature monitor circuit. A power good output
voltage monitor indicates when the output is in
regulation.
The ISL8013 is offered in a space saving 4x4 QFN lead
free package with exposed pad lead frames for low
thermal resistance.
The ISL8013 includes a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
efficiency and minimize external component count. The
100% duty-cycle operation allows less than 300mV
dropout voltage at 3A.
The ISL8013 offers a 1ms Power Good (PG) timer at
power-up. When shutdown, ISL8013 discharges the
output capacitor. Other features include internal
soft-start, internal compensation, overcurrent protection,
and thermal shutdown.
The ISL8013 is offered in a 4mmx4mm 16 Ld QFN
package with 1mm maximum height. The complete
converter occupies less than 0.4in2 area.
Features
• High Efficiency Synchronous Buck Regulator with up
to 97% Efficiency
• Power-Good (PG) Output with a 1ms Delay
• 2.7V to 5.5V Supply Voltage
• 3% Output Accuracy Over-Temperature/Load/Line
• 3A Output Current
• Start-Up with Pre-Biased Output
• Internal Soft-Start - 1ms
• Soft-Stop Output Discharge During Disabled
• 35µA Quiescent Supply Current in PFM Mode
• Selectable Forced PWM Mode and PFM Mode
• External Synchronization up to 4MHz
• Less than 1µA Logic Controlled Shutdown Current
• 100% Maximum Duty Cycle
• Internal Current Mode Compensation
• Peak Current Limiting and Hiccup Mode Short Circuit
Protection
• Over-Temperature Protection
• Small 16 Ld 4mmx4mm QFN
• Pb-Free (RoHS Compliant)
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Portable Instruments
• Test and Measurement Systems
• Li-ion Battery Powered Devices
• Small Form Factor (SFP) Modules
• Bar Code Readers
November 23, 2009
FN6309.3
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007, 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL8013
Absolute Maximum Ratings (Reference to GND)
VIN, VDD . . . . . . . . . . . . . . -0.3V to 6V (DC) or 7V (20ms)
EN, SYNCH, PG . . . . . . . . . . . . . . . . . . -0.3V to VIN + 0.3V
LX . . . -1.5V (100ns)/-0.3V (DC) to 6.5V (DC) or 7V (20ms)
VFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
Recommended Operating Conditions
VIN Supply Voltage Range . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . 0A to 3A
Ambient Temperature Range . . . . . . . . . . . . -40°C to +85°C
Thermal Information
Thermal Resistance (Typical, Notes 4, 5))θJA (°C/W)θJC (°C/W)
16 Ld 4x4 QFN Package . . . . . . . 39
3
Junction Temperature Range . . . . . . . . . . -55°C to +125°C
Storage Temperature Range . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach”
features. See Tech Brief TB379.
5. θJC, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications
Unless otherwise noted, all parameter limits are established over the recommended
operating conditions and the typical specification are measured at the following conditions:
TA = -40°C to +85°C, VIN = 3.6V, EN = VDD, unless otherwise noted. Typical values are at
TA = +25°C. Boldface limits apply over the operating temperature range, -40°C to
+85°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7)
UNITS
INPUT SUPPLY
VIN Undervoltage Lockout Threshold
VUVLO
Rising, no load
Falling, no load
- 2.5 2.7
2.2 2.4
-
V
V
Quiescent Supply Current
IVIN
SYNCH = GND, no load at the output
SYNCH = GND, no load at the output
and no switches switching
-
-
35 -
30 45
µA
µA
SYNCH = VDD, FS = 1MHz, no load - 6.5 10
at the output
mA
Shut Down Supply Current
OUTPUT REGULATION
ISD VIN = 5.5V, EN = low
- 0.1 2
µA
Reference Voltage
VFB Bias Current
Line Regulation
VREF
IVFB
VFB = 0.75V
VIN = VO + 0.5V to 5.5V (minimal
2.7V)
0.790 0.8 0.810
- 0.1 -
- 0.2 -
V
µA
%/V
Soft-Start Ramp Time Cycle
-1-
ms
OVERCURRENT PROTECTION
Current Limit Blanking Time
Overcurrent and Auto Restart
Period
tOCON
tOCOFF
- 17 - Clock pulses
- 4 - SS cycle
Switch Current Limit
Peak Skip Limit
COMPENSATION
ILIMIT
ISKIP
(Note 6)
(Note 6)
4.0 4.8 5.9
- 1.2 -
A
A
Error Amplifier Trans-Conductance
- 20 -
µA/V
Trans-Resistance
RT
0.213 0.25 0.287
Ω
5 FN6309.3
November 23, 2009
5 Page 
ISL8013
Typical Operating Performance
(Unless otherwise noted, operating conditions are: TA = +25°C,
VVIN = 2.5V to 5.5V, EN = VIN, SYNCH = 0V, L = 1.5µH,
C1 = 2x22µF, C2 = 2x22µF, IOUT = 0A to 3A). (Continued)
EN 5V/DIV
EN 5V/DIV
VOUT 0.5V/DIV
IL 1A/DIV
PG 5V/DIV
FIGURE 27. SOFT-START AT FULL LOAD
VOUT 0.5V/DIV
IL 1A/DIV
PG 5V/DIV
FIGURE 28. SOFT-DISCHARGE SHUTDOWN
LX 2V/DIV
SYNCH 2V/DIV
VOUT RIPPLE 20mV/DIV
IL 1A/DIV
FIGURE 29. STEADY STATE OPERATION AT NO LOAD
WITH FREQUENCY = 2MHz
LX 2V/DIV
IL 1A/DIV
SYNCH 2V/DIV
VOUT RIPPLE 20mV/DIV
FIGURE 30. STEADY STATE OPERATION AT FULL
LOAD WITH FREQUENCY = 2MHz
LX 2V/DIV
SYNCH 2V/DIV
VOUT RIPPLE 20mV/DIV
IL 1A/DIV
FIGURE 31. STEADY STATE OPERATION AT NO LOAD
WITH FREQUENCY = 4MHz
11
LX 2V/DIV
IL 1A/DIV
SYNCH 2V/DIV
VOUT RIPPLE 20mV/DIV
FIGURE 32. STEADY STATE OPERATION AT FULL
LOAD (PWM) WITH FREQUENCY = 4MHz
FN6309.3
November 23, 2009
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ISL8013.PDF ] | |
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