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ISL91127IR 데이터시트 PDF




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부품번호 ISL91127IR 기능
기능 High Efficiency Buck-Boost Regulator
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ISL91127IR 데이터시트, 핀배열, 회로
DATASHEET
High Efficiency Buck-Boost Regulator with 4.5A
Switches
ISL91127IR
The ISL91127IR 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 ISL91127IR 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 30µA optimize efficiency under all load
conditions.
The ISL91127IR supports stand-alone 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 ISL91127IR is available in a 20 Ld, 0.5mm pitch QFN
(4mmx4mm) package. The 2.5MHz switching frequency further
reduces the size of external components.
Related Literature
UG080, “ISL91127IRN-EVZ, ISL91127IR2A-EVZ,
ISL91127IRA-EVZ Evaluation Boards User Guide”
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)
• High efficiency: up to 96%
• 30µA quiescent current maximizes light-load efficiency
• 2.5MHz switching frequency minimizes external component
size
• Fully protected for short-circuit, over-temperature and
undervoltage
• 20 Ld 4mmx4mm QFN package
Applications
• Handheld and battery powered consumer and medical devices
• Brownout free system voltage for smartphones and tablet PCs
• Wireless communication devices
• 2G/3G/4G RF power amplifiers
VIN = 1.8V TO 5.5V
C1
10µF
ISL91127IRNZ
PVIN
LX1
VIN
EN
MODE
LX2
VOUT
FB
SGND PGND
L1
1µH
VOUT = 3.3V
C2
2x22µF
FIGURE 1. TYPICAL APPLICATION: VOUT = 3.3V
100
95
90
85
VIN = 2.5V
80 VIN = 3.3V
75 VIN = 3.6V
70
1
VIN = 4V
10
100 1000
LOAD CURRENT (mA)
FIGURE 2. EFFICIENCY: VOUT = 3.3V, TA = +25°C
August 3, 2016
FN8859.1
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 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.




ISL91127IR pdf, 반도체, 판매, 대치품
ISL91127IR
Absolute Maximum Ratings
PVIN, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
LX1, LX2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
FB (Adjustable Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
FB (Fixed VOUT Versions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
GND, PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
ESD Rating
Human Body Model (Tested per JS-001-2010) . . . . . . . . . . . . . . . . .2.5kV
Machine Model (Tested per JESD22-A115C) . . . . . . . . . . . . . . . . . 250V
Charged Device Model (Tested per JS-002-2014) . . . . . . . . . . . . . . . 1kV
Latch-Up (Tested per JESD-78B; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
20 Ld 4x4 QFN Package (Notes 4, 5). . . . .
40
5
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+125°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 5.5V
Maximum Load Current
VIN = 2.5V VOUT = 3.3V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2ADC
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. 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
5. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Analog Specifications VIN = VPVIN = VEN = 3.6V, VOUT = 3.3V, L1 = 1µH, C1 = 10µF, 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.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX
(Note 6) (Note 7) (Note 6) UNIT
POWER SUPPLY
VIN
VUVLO
Input Voltage Range
VIN Undervoltage Lockout Threshold
Rising
Falling
1.8
1.55
1.725
1.65
5.5
1.795
V
V
V
IVIN VIN Supply Current
PFM mode, 1.8V VIN 5V, no external load on VOUT
(Note 8)
30 55 µA
ISD VIN Supply Current, Shutdown
OUTPUT VOLTAGE REGULATION
EN = GND, VIN = 3.6V
0.05 1.00
µA
VOUT
Output Voltage Range
Output Voltage Accuracy
VFB
IFB
VOUT/
VIN
VOUT/
IOUT
VOUT/
VI
VOUT/
IOUT
VCLAMP
FB Pin Voltage Regulation
FB Pin Bias Current
Line Regulation, PWM Mode
Load Regulation, PWM Mode
Line Regulation, PFM Mode
Load Regulation, PFM Mode
Output Voltage Clamp
Output Voltage Clamp Hysteresis
ISL91127IIAZ, IOUT = 100mA, VIN = 3.6V
VIN = 3.7V, VOUT = 3.3V, IOUT = 0mA, PWM mode
VIN = 3.7V, VOUT = 3.3V, IOUT = 1mA, PFM mode
For adjustable output version, VIN = 3.6V
For adjustable output version
IOUT = 500mA, VOUT = 3.3V, VIN step from 2.3V to 5.5V
1.0
-2
-3
0.783
0.800
±5
5.2
+2
+4
0.813
20
V
%
%
V
nA
mV/V
VIN = 3.7V, VOUT = 3.3V, IOUT step from 0mA to 1000mA
±0.005
mV/mA
IOUT = 100mA, VOUT = 3.3V, VIN step from 2.3V to 5.5V
±12.5
mV/V
VIN = 3.7V, VOUT = 3.3V, IOUT step from 0mA to 100mA
±0.4
mV/mA
Rising
5.25
5.95
V
400 mV
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ISL91127IR 전자부품, 판매, 대치품
ISL91127IR
Typical Performance Curves Unless otherwise noted, operating conditions are: TA = +25°C, VIN = EN = 3.6V, L = 1µH,
C1 = 10µF, C2 = 2x22µF, VOUT = 3.3V, IOUT = 0A to 3A (Continued)
EN (2V/DIV)
VOUT (2V/DIV)
IL (2A/DIV)
1ms/DIV
FIGURE 10. SOFT-START (VIN = 3.6V, VOUT = 3.3V, NO LOAD)
EN (2V/DIV)
VOUT (2V/DIV)
IL (2A/DIV)
1ms/DIV
FIGURE 11. SOFT-START (VIN = 3.6V, VOUT = 3.3V, 1A R-LOAD)
LX1 (5V/DIV)
LX2 (5V/DIV)
VOUT (100mV/DIV)
IL (2A/DIV)
400ns/DIV
FIGURE 12. STEADY STATE OPERATION (VIN = 2.5V, VOUT = 3.3V,
2A LOAD)
VOUT (100mV/DIV)
IL (1A/DIV)
100µs/DIV
FIGURE 13. 0A TO 2A LOAD TRANSIENT (VIN = 3.6V, VOUT = 3.3V)
VOUT (100mV/DIV)
VOUT (100mV/DIV)
IL (500mA/DIV)
100µs/DIV
FIGURE 14. 0.5A TO 1.5A LOAD TRANSIENT (VIN = 3.6V, VOUT = 3.3V)
IL (500mA/DIV)
100µs/DIV
FIGURE 15. 0A TO 1A LOAD TRANSIENT (VIN = 3.6V, VOUT = 3.3V)
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부품번호상세설명 및 기능제조사
ISL91127IR

High Efficiency Buck-Boost Regulator

Intersil
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