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PDF ISL91110 Data sheet ( Hoja de datos )
| Número de pieza | ISL91110 | |
| Descripción | High Efficiency Buck-Boost Regulator | |
| Fabricantes | Intersil | |
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DATASHEET
High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91110
The ISL91110 is a high-current buck-boost switching regulator
for systems using new battery chemistries. It uses Intersil’s
proprietary buck-boost algorithm to maintain voltage regulation
while providing excellent efficiency and very low output voltage
ripple when the input voltage is close to the output voltage.
The ISL91110 is capable of delivering at least 2A continuous
output current (VOUT = 3.3V) over a battery voltage range of 2.5V
to 4.35V. This maximizes the energy utilization of advanced
single-cell Li-ion battery chemistries that have significant
capacity left at voltages below the system voltage. Its fully
synchronous low ON-resistance 4-switch architecture and a low
quiescent current of only 35µA optimize efficiency under all load
conditions.
The ISL91110 supports standalone applications with a fixed 3.3V
or 3.5V output voltage or adjustable output voltage with an
external resistor divider. Output voltages as low as 1.0V or as
high as 5.2V are supported.
The ISL91110 is available in a 25-bump, 0.4mm pitch WLCSP
(2.33mmx2.07mm) and a 2.5MHz switching frequency, which
further reduces the size of external components.
Features
• Accepts input voltages above or below regulated output
voltage
• Automatic and seamless transitions between buck and boost
modes
• Input voltage range: 1.8V to 5.5V
• Output current: up to 2A (PVIN = 2.5V, VOUT = 3.3V)
• Burst current: up to 3A (PVIN = 3V, VOUT = 3.3V, tON < 600µs,
t = 4.6ms)
• High efficiency: up to 96%
• 35µA quiescent current maximizes light-load efficiency
• 2.5MHz switching frequency minimizes external component
size
• Fully protected for short-circuit, over-temperature, and
undervoltage
• Small 2.33mmx2.07mm WLCSP
Applications
• Brownout free system voltage for smartphones and tablet PCs
• Wireless communication devices
• 2G/3G/4G RF power amplifiers
Related Literature
• AN1912 “ISL91110IIN-EVZ, ISL91110II2A-EVZ,
ISL91110IIA-EVZ Evaluation Boards”
ISL911 10IINZ
VIN = 1.8V TO 5.5V PVIN
C1
2x10µF
LX1
VIN
EN
MODE
LX2
VOUT
FB
L1
1µH
VOUT = 3.3V
IOUT = UP TO 3A
C2
2x22µF
NOTE: Confirm w ith Intersil Applica tions E ngine er for any de via tion
from a bove circ uit
FIGURE 1. TYPICAL APPLICATION: VOUT = 3.3V
100
VIN = 4.0V
95
90
VIN = 3.6V
VIN = 3.3V
85
80
VIN = 3.0V
VIN = 2.5V
751 10 100 1000
LOAD CURRENT (mA)
FIGURE 2. EFFICIENCY: VOUT = 3.3V, TA = +25°C
February 5, 2016
FN8434.4
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 2013, 2014, 2016. 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  
ISL91110
Analog Specifications VIN = VPVIN = VEN = 3.6V, VOUT = 3.3V, L1 = 1µH, C1 = 2x10µF, C2 = 2x22µF, TA = +25°C. Boldface limits apply
across the operating temperature range, -40°C to +85°C and input voltage range (1.8V to 5.5V) unless specified otherwise. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX
(Note 6) (Note 7) (Note 6) UNIT
SOFT-START AND SOFT DISCHARGE
tSS Soft-Start Time
Time from when EN signal asserts to when output
voltage ramp starts.
1
ms
Time from when output voltage ramp starts to
1 ms
when output voltage reaches 95% of its nominal
value with device operating in buck mode.
VIN = 4V, VOUT = 3.3V, IO = 200mA
Time from when output voltage ramp starts to
2 ms
when output voltage reaches 95% of its nominal
value with device operating in boost mode.
VIN = 2V, VOUT = 3.3V, IO = 200mA
RDISCHG VOUT Soft-Discharge ON-Resistance
EN < VIL
120 Ω
POWER MOSFET
RDSON_P P-Channel MOSFET ON-Resistance
RDSON_N N-Channel MOSFET ON-Resistance
IPK_LMT P-Channel MOSFET Peak Current Limit
PFM/PWM TRANSITION
VIN = 3.6V, IO = 200mA
VIN = 2.5V, IO = 200mA
VIN = 3.6V, IO = 200mA
VIN = 2.5V, IO = 200mA
40 mΩ
55 mΩ
30 mΩ
45 mΩ
3.9 4.5 5.1
A
Load Current Threshold, PFM to PWM
Load Current Threshold, PWM to PFM
Thermal Shutdown
VIN = 3.6V, VOUT = 3.3V
VIN = 3.6V, VOUT = 3.3V
200 mA
75 mA
155 °C
Thermal Shutdown Hysteresis
30 °C
LOGIC INPUTS
ILEAK Input Leakage
VIN = 3.6V
0.05 1.00
µA
VIH Input HIGH Voltage
VIN = 3.6V
1.4 V
VIL Input LOW Voltage
VIN = 3.6V
0.4 V
NOTES:
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.
7. Typical values are for TA = +25°C and VIN = 3.6V.
8. Quiescent current measurements are taken when the output is not switching.
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5
FN8434.4
February 5, 2016
5 Page 
ISL91110
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you
have the latest revision.
DATE
REVISION
CHANGE
February 5, 2016
FN8434.4
Added Note to Figure 1 on page 1.
Updated pin configuration on page 3 by adding labels.
Added Table 1 on page 3.
November 20, 2014
FN8434.3
On page 8, "Short Circuit Protection" section title was updated to "Overcurrent Protection." Also in the newly
titled "Overcurrent Protection" section, a paragraph was added to explain hiccup mode operation.
October 28, 2014
FN8434.2
On Page 1, 3rd paragraph, changed output as low as 0.8V, as high as 5.25V to: "changed output as low as
1.0V, as high as 5.2V".
The IC label on Figure 19 changed from ISL91110INZ to ISL91110IIAZ
Tjb changed from 14 to 13 in Thermal information.
August 22, 2014
FN8434.1
Updated Figure 1 on page 1, Changed text from “"Li-ion Battery 2.5V to 4.35V" to "VIN = 1.8V TO 5.5V" and
"MAX. IOUT = 2A (Min)" to "IOUT = UP TO 3A"
Replaced Figure 2 on page 1.
Added -T7A parts to the “Ordering Information” table on page 3.
Changed “IFB” on page 4, max spec from “1µA to 20nA”.
Changed Section title on page 5 from “EN LOGIC INPUTS” to “LOGIC INPUTS”.
Added “Typical Performance Curves” on page 6.
Changed text on Figure 19 on page 9, from "VOUT=0.8V TO 5.25V, UP TO 3A" to "VOUT = 1V to 5.2V, UP TO 3A"
Replaced “Package Outline Drawing” on page 12.
December 24, 2013 FN8434.0 Initial Release.
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support.
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be
accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ISL91110.PDF ] | |
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