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ISL8011IRZ

P1-P3P4-P6P7-P9P10-P10
1
®
FN9254.2
ISL8011
1.2A Integrated FETs, High Efficiency
Synchronous Buck Regulator
ISL8011 is an integrated FET, 1.2A synchronous buck
regulator for general purpose point-of load applications. It is
optimized for generating low output voltages down to 0.8V.
The supply voltage range is from 2.7V to 5.5V allowing the
use from common 3.3V or 5V supply rails and Lithium ion
battery inputs. It has guaranteed minimum output current of
1.2A. 1.5MHz pulse-width modulation (PWM) switching
frequency allowing the use of small external components.
The ISL8011 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 200mV dropout voltage at 1.2A.
The ISL8011 offers a 200ms Power-On-Reset (POR) timer
at power-up. When shutdown, the ISL8011 discharges the
output capacitor. Other features include internal digital
soft-start, enable for power sequence, overcurrent
protection, and thermal shutdown.
The ISL8011 is offered in a 10 Ld 3mmx3mm DFN package
with 1mm maximum height. The complete converter
occupies less than 1cm
2
area.
Features
• High Efficiency Synchronous Buck Regulator with Up to
95% Efficiency
• 2.7V to 5.5V Supply Voltage
• 1.2A Output Current
• 100% Maximum Duty Cycle
• Peak Current Limiting, Short Circuit Protection
• 200ms Power-On Reset
• 3% Output Accuracy Over-Temperature/Load/Line
• Less than 1µA Logic Controlled Shutdown Current
• Internal Loop Compensation
• Internal Digital Soft-Start
• Over-Temperature Protection
• Enable
• Small 10 Ld 3mmx3mm DFN
• 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
Pinout
ISL8011
(10 LD 3x3 DFN)
TOP VIEW
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL8011IRZ 011Z -40 to +85 10 Ld 3x3 DFN L10.3x3C
ISL8011IRZ-T* 011Z -40 to +85 10 Ld 3x3 DFN
Tape and Reel
L10.3x3C
*Please refer to TB347 for details on reel specifications.
NOTE: 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.
2
3
4
1
5
9
8
7
10
6
PVIN
VCC
EN
POR
GND
PHASE
PGND
SGND
FB
N/C
Data Sheet August 4, 2009
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. 2006, 2007, 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
2
FN9254.2
August 4, 2009
Absolute Maximum Ratings (Reference to SGND) Thermal Information
Supply Voltage (PVIN, V
CC
) . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
EN, MODE, PHASE, POR . . . . . . . . . . . . . . . . . .-0.3V to V
CC
+0.3V
FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
Recommended Operating Conditions
PVIN Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 1.2A
Ambient Temperature Range. . . . . . . . . . . . . . . . . . .-40°C to +85°C
Thermal Resistance (Notes 1, 2) θ
JA
(°C/W) θ
JC
(°C/W)
10 Ld 3x3 DFN Package . . . . . . . . . . . 48 5
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
AUTION: 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:
1. θ
JA
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.
2. θ
JC
, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications T
A
= +25°C, V
PVIN
= V
VCC
= 3.6V, EN = V
CC
, L = 1.8µH, C
1
= 10µF, C
2
= 10µF, I
OUT
= 0A (see “Typical
Applications” on page 6); Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
specified. Temperature limits established by characterization and are not production tested.
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
SUPPLY
V
CC
Undervoltage Lockout Threshold V
UVLO
Rising - 2.5 2.7 V
Falling 2.2 2.4 - V
Quiescent Supply Current I
PVIN
No load at the output - 5 8 mA
Shut Down Supply Current I
SD
V
CC
= PVIN = 5.5V, EN = low - 0.1 2 µA
OUTPUT REGULATION
FB Regulation Voltage V
FB
T
A
= 0°C to +85°C 0.784 0.8 0.816 V
T
A
= -40°C to +85°C 0.78 0.8 0.82 V
FB Bias Current I
FB
FB = 0.75V - 0.1 - µA
Output Voltage Accuracy PVIN = V
O
+ 0.5V to 5.5V, I
O
= 0A to 1.2A,
T
A
= -40°C to +85°C
-3 - 3 %
Line Regulation PVIN = V
O
+ 0.5V to 5.5V (minimal 2.7V) - 0.2 - %/V
Maximum Output Current 1.2 - - A
COMPENSATION
Error Amplifier Trans-conductance Adjustable version, design info only - 20 - µA/V
PHASE
P-Channel MOSFET On-Resistance PVIN = 3.6V, I
O
= 200mA - 0.12 0.22 Ω
PVIN = 2.7V, I
O
= 200mA - 0.16 0.27 Ω
N-Channel MOSFET On-Resistance PVIN = 3.6V, I
O
= 200mA - 0.11 0.22 Ω
PVIN = 2.7V, I
O
= 200mA - 0.15 0.27 Ω
P-Channel MOSFET Peak Current Limit I
PK
1.5 2.1 2.6 A
PHASE Maximum Duty Cycle - 100 - %
PWM Switching Frequency f
S
T
A
= -40°C to +85°C 1.35 1.6 1.75 MHz
PHASE Minimum On Time - - 140 ns
Soft Start-Up Time -1.1-ms
ISL8011
3
FN9254.2
August 4, 2009
POR
Output Low Voltage Sinking 1mA, FB = 0.7V - - 0.3 V
Delay Time 150 200 275 ms
POR Pin Leakage Current POR = V
CC
= 3.6V - 0.01 0.1 µA
Minimum Supply Voltage for Valid POR Signal 1.2 - - V
Internal PGOOD Low Rising Threshold Percentage of Nominal Regulation Voltage 89.5 92 94.5 %
Internal PGOOD Low Falling Threshold Percentage of Nominal Regulation Voltage 85 88 91 %
Internal PGOOD High Rising Threshold Percentage of Nominal Regulation Voltage 105.5 108 110.5 %
Internal PGOOD High Falling Threshold Percentage of Nominal Regulation Voltage 102 105 108 %
Internal PGOOD Delay Time -50-µs
EN
Logic Input Low --0.4V
Logic Input High 1.4 - - V
Logic Input Leakage Current Pulled up to 5.5V - 0.1 1 µA
Thermal Shutdown - 150 - °C
Thermal Shutdown Hysteresis -25-°C
Electrical Specifications T
A
= +25°C, V
PVIN
= V
VCC
= 3.6V, EN = V
CC
, L = 1.8µH, C
1
= 10µF, C
2
= 10µF, I
OUT
= 0A (see “Typical
Applications” on page 6); Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
specified. Temperature limits established by characterization and are not production tested. (Continued)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
Typical Operating Performance
FIGURE 1. EFFICIENCY vs LOAD CURRENT (V
IN
= 5.0V)
FIGURE 2. V
OUT
vs LOAD CURRENT (V
IN
= 5V)
60
70
80
90
100
50 200 350 500 650 800 950 1100
LOAD CURRENT (mA)
EFFICIENCY (%)
V
OUT
= 3.3V
V
OUT
= 1.8V
V
OUT
= 2.5V
2.40
2.45
2.50
2.55
2.60
50 250 450 650 850 1050
LOAD CURRENT (mA)
V
OUT
(V)
ISL8011
P1-P3P4-P6P7-P9P10-P10

ISL8011IRZ

Mfr. #:
Buy ISL8011IRZ
Manufacturer:
Renesas / Intersil
Description:
Switching Voltage Regulators W/ANNEAL LW IQ BUCKG W/INTEGRTD FET
Lifecycle:
New from this manufacturer.
Delivery:
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