Intersil 交换式稳压器选型
【选型】Intersil 消费电子IC选型指南
选型目录：
移动计算电源管理解决方案
处理器核心电源
PMIC
电池充电器
交换式稳压器
消费电子LDO
显示和背光驱动器
消费电子LED背光驱动器
TFT-LCD的DC/DC稳压器
消费电子光传感器
消费电子IC设计工具和支持
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16
\ Consumer Electronics
Switching Regulators
Buck-Boost Regulators for
Smart Phones and Tablets
• Buck-boost improves battery
life and extends usable range of
battery voltage
• Buck-boost can be used for
system supply, RF power amp
or WiFi supplies, memory cards,
LCD power and other peripherals
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Mobile devices are becoming more power hungry as
consumers continue to demand increased processing
capability and seamless connectivity in shrinking form
factors. Issues such as shortened battery life, glitches and
overheating often result from these increased system
demands and negatively impact consumers’ experiences.
Intersil helps OEMs to address these issues head on with
the ISL911xx switching regulators by improving the system
performance and power effi ciency of their devices.
Intersil’s ISL911xx buck-boost switching regulators are used
in mobile devices to supply the system power management
IC (PMIC), the Wi-Fi or radio frequency (RF) power amplifi er,
as well as other system peripherals such as the camera
and memory interfaces. The ISL911xx family is based on
proprietary, fully synchronous four-switch architecture.
This advanced architecture enables the seamless transition
from buck to boost, delivery of up to 2.5A output current
at the lowest single-cell Li battery voltages to signifi cantly
improve power effi ciency, increase battery life and prevent
overheating of mobile devices.
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Consumer Electronics /
17
Boost Regulator
ISL9111/A, ISL9113/A
•L
ow input start-up voltage
–
0.8V (ISL9111)
–
0.6V (ISL9111A)
• High eff iciency
–
Up to 97% (ISL9111/A)
–
Up to 95% (ISL9113/A)
• Output current
–
240mA (V
IN
= 1.8V, V
OUT
= 3.3V)
(ISL9111/A)
–
500mA (V
BAT
= 3.0V, V
OUT
= 5.0V)
(ISL9113/A)
• Low quiescent current: 20μA (typ)
• Logic control shutdown (I
Q
< 1μA)
• Output disconnect during shutdown
• Small package
–
6 Ld SOT-23 (ISL9111/A)
–
8 Ld 2x2mm DFN (ISL9113A)
–
8 Ld 2x2mm DFN and
6 bump 0.8x1.36mm WLCSP
(ISL9113)
Boost+Bypass Regulators
ISL91132/33/34
• Input voltage range: 2.35V to 5.4V
• Ultra high eff iciency up to 96%
• Output current (V
IN
= 2.5V, V
OUT
= 3.3V)
–
1.8A (ISL91132/34)
–
2.3A (ISL91133)
• Switching frequency: 2.9MHz (max)
• True bypass feature w/ 27mΩ
impedance
• Boost conversion from an input
range of 2.35V to 5.4V to an output
range of 3.15V to 5.2V, supports
multiple battery chemistries
• Bypass can be forced or automatic
• VSEL function permits system to
ramp up the output for large system
load transient, allows optimum
system eff iciency and stability
• Small 16
bump
1.78x1.78mm WLCSP
Buck-Boost Regulators
ISL91127/28
• Input voltage range: 1.8V to 5.5V
• Ultra high eff iciency up to 96%
• Output current
–
2A (PV
IN
= 2.8V, V
OUT
= 3.3V)
(ISL91107/IR)
–
2.1A (PV
IN
= 2.5V, V
OUT
= 3.3V)
(ISL91127)
–
2.4A (PV
IN
= 2.5V, V
OUT
= 3.3V)
(ISL91128)
• 2.5MHz switching frequency
minimizes external component size
• 30μA quiescent current: the lowest
of any high current buck-boost in the
industry
• Adjustable output voltage range
from 1V to 5.2V, or fixed at 3.3V
• I
2
C programmable dynamic output
voltage adjustability (ISL91128)
• Small 20 Ld 4mm x 4mm QFN and
2.15mm x 1.74mm WLCSP package
options
www.renesas.com
18
\ Consumer Electronics
Switching Regulators
ISL9120
Ultra-Small, Highest
Effi ciency Buck-Boost
Regulator for Wearables
and Other Mobile Devices
Intersil’s ISL9120 buck-boost regulator enables
effi cient power management of system power
supplies and peripherals such as Wi-Fi, Bluetooth
®
,
memory cards or LCD modules. Its adaptive current
limit PFM architecture delivers industry-leading
effi ciency up to 98%, while providing smooth
transitions between buck and boost modes and rapid
transient response.
The ISL9120’s ultra-small form factor makes it ideal
for the connected devices making up the Internet
of Things including wearables, smartphones, smart
thermostats and point-of-sale devices.
•
Ultra high effi
ciency up to 98% reduces power drain
and heat buildup
•
Accepts a wide input voltage range from 1.8V to 5.5V,
works with multiple battery topologies
•
Large adjustable output voltage range from 1V to 5.2V
for use with multiple power rails
•
Output current up to 800mA (V
IN
= 2.5V, V
OUT
= 3.3V)
• 2A switches supports both high and light load currents
with high effi ciency
•
Ultra-small footprint with 1.41mm x 1.41mm package
saves board space, requires only a single inductor
(Also available in 12 Ld TQFN package)
•
Automatic and selectable forced bypass power saving
mode reduces quiescent current to less than 0.5μA
•
Full protection for under-voltage, short-circuit and
over-temperature
Ultra-small 1.41mm x 1.41mm WLCSP package
www.renesas.com
Consumer Electronics /
19
Buck-Boost, Boost, Buck Regulators
— For handheld devices
Type
Device
V
IN
Range
(V)
I
LIM
(typ)
(A)
V
OUT
Range
(V)
I
Q
typ
(μA)
Switching
Freq max
(MHz)
Package
Description
Buck-
Boost
ISL9120
1.8 to 5.5
2
1 to 5.2
41
-
9 Bump WLCSP,
12 Ld TQFN
Compact, Low Power
ISL9110/A
1.8 to 5.5
2.4
1 to 5.2
35
2.5
12 Ld DFN,
20 Bump WLCSP (A
ver only)
ISL9112
1.8 to 5.5
2.4
1.9 to 5
35
2.5
12 Ld 3x3 DFN
ISL91107
1.8 to 5.5
3.8
1 to 5.2
45
2.75
15 Bump WLCSP
ISL91107IR
1.8 to 5.5
3.8
1 to 5.2
45
2.75
20 Ld TQFN
ISL91108
1.8 to 5.5
4.2
1 to 5.2
27.5
2.6
20 Bump WLCSP
ISL91110
1.8 to 5.5
4.5
1 to 5.2
35
2.5
20 Bump WLCSP
ISL91127
1.8 to 5.5
4.3
1 to 5.2
30
2.9
20 Bump WLCSP
ISL91127IR
1.8 to 5.5
4.3
1 to 5.2
30
2.9
20 Ld QFN
ISL91128
1.8 to 5.5
4.3
1.9 to 5
30
2.9
20 Bump WLCSP
I
2
C and DVS, Selectable
Bypass Mode
Boost
ISL9111/A
0.7 to 5.25
0.5 to 5.25 (A)
1
2.5 to 5.25
-
1.4
6 Ld SOT-23
Very Low Start-up Voltage:
0.6V (ISL9111A), 0.8V
(ISL9111)
ISL9113/A
0.8 to 4.7
1
1 to 5.2
20
2.0
8 Ld DFN,
6 Bump WLCSP
(non-A ver only)
For USB-OTG. Tiny 6 bump
0.8mmx1.36mm WLCSP
Package (non-A ver only)
ISL91132
2.35 to 5.4
3.7
3.15 to 5.2
45
2.9
16 Bump WLCSP
Ideal for System Supply w/
Single-Cell Li-Ion Battery as
Input
ISL91133
2.35 to 5.4
4.5
3.15 to 5.2
45
2.9
16 Bump WLCSP
Ideal for System Supply w/
Single-Cell Li-Ion Battery as
Input
ISL91134
2.35 to 5.4
3.7
5 to 5.2
45
2.9
16 Bump WLCSP
Ideal for Audio Class-D
Amplifier Supply
Buck:
Int FET
ISL9103A
2.7 to 6
0.95
0.8 to 6
32
2.4
6 Ld μTDFN
ISL9104/A
2.7 to 6
1
0.8 to 6
20
4.3
6 Ld μTDFN
Buck:
Sub-
PMIC
ISL9305
2.3 to 5.5
1.3
0.8 to 5.5
50
3.4
16 Ld TQFN
Dual Step-Down Converters
and Dual Low-Input LDOs with
I
2
C Compatible Interface
ISL9307
2.5 to 5.5
2.5
0.9 to 3.3
50
3.4
16 Ld TQFN
Dual 1500mA Step-Down
Converters and Dual Low-
Input LDOs
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