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LM2735XMF

520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator

器件类别：电源/电源管理    电源电路   

厂商名称：National Semiconductor（TI ）

厂商官网：http://www.ti.com

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参数 预览 参数对比
器件参数
参数名称
属性值
是否Rohs认证
不符合
厂商名称
National Semiconductor（TI ）
包装说明
SOT-23, 5 PIN
Reach Compliance Code
_compli
ECCN代码
EAR99
其他特性
ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V
模拟集成电路 - 其他类型
SWITCHING REGULATOR
控制模式
VOLTAGE-MODE
控制技术
PULSE WIDTH MODULATION
最大输入电压
5.5 V
最小输入电压
2.7 V
标称输入电压
5 V
JESD-30 代码
R-PDSO-G5
JESD-609代码
e0
长度
2.92 mm
湿度敏感等级
1
功能数量
1
端子数量
5
最高工作温度
125 °C
最低工作温度
-40 °C
最大输出电流
3 A
封装主体材料
PLASTIC/EPOXY
封装代码
TSSOP
封装等效代码
TSOP5/6,.11,37
封装形状
RECTANGULAR
封装形式
SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）
260
认证状态
Not Qualified
座面最大高度
1.19 mm
表面贴装
YES
切换器配置
BOOST
最大切换频率
2000 kHz
温度等级
AUTOMOTIVE
端子面层
Tin/Lead (Sn85Pb15)
端子形式
GULL WING
端子节距
0.953 mm
端子位置
DUAL
处于峰值回流温度下的最长时间
40
宽度
1.6 mm
文档预览
LM2735 520kHz/1.6MHz – Space-Efficient Boost and SEPIC DC-DC Regulator
August 2007
LM2735
520kHz/1.6MHz – Space-Efficient Boost and SEPIC DC-DC
Regulator
General Description
The LM2735 is an easy-to-use, space-efficient 2.1A low-side
switch regulator ideal for Boost and SEPIC DC-DC regulation.
It provides all the active functions to provide local DC/DC
conversion with fast-transient response and accurate regula-
tion in the smallest PCB area. Switching frequency is inter-
nally set to either 520kHz or 1.6MHz, allowing the use of
extremely small surface mount inductor and chip capacitors
while providing efficiencies up to 90%. Current-mode control
and internal compensation provide ease-of-use, minimal
component count, and high-performance regulation over a
wide range of operating conditions. External shutdown fea-
tures an ultra-low standby current of 80 nA ideal for portable
applications. Tiny SOT23-5, LLP-6, and eMSOP-8 packages
provide space-savings. Additional features include internal
soft-start, circuitry to reduce inrush current, pulse-by-pulse
current limit, and thermal shutdown.
Features
■
■
■
■
■
■
■
■
■
Input voltage range 2.7V to 5.5V
Output voltage range 3V to 24V
2.1A switch current over full temperature range
Current-Mode control
Logic high enable pin
Ultra low standby current of 80 nA in shutdown
170 mΩ NMOS switch
±2% feedback voltage accuracy
Ease-of-use, small total solution size
Internal soft-start
Internal compensation
Two switching frequencies
520 kHz (LM2735-Y)
1.6 MHz (LM2735-X)
Uses small surface mount inductors and chip capacitors
Tiny SOT23-5, LLP-6, and eMSOP-8 packages
Applications
■
■
■
■
■
LCD Display Backlighting For Portable Applications
OLED Panel Power Supply
USB Powered Devices
Digital Still and Video Cameras
White LED Current Source
Typical Boost Application Circuit
20215801
20215815
Efficiency vs Load Current V
O
= 12V
© 2007 National Semiconductor Corporation
202158
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LM2735
Connection Diagrams
Top View
Top View
Top View
20215803
5-Pin SOT23
20215804
6-Pin LLP
20215805
8-Pin eMSOP
Ordering Information
Order Number
LM2735YMF
LM2735YMFX
LM2735YSD
LM2735YSDX
LM2735YMY
LM2735YMYX
LM2735XMF
LM2735XMFX
LM2735XSD
LM2735XSDX
LM2735XMY
LM2735XMYX
1.6MHz
520kHz
Description
Package Type
SOT23-5
LLP-6
eMSOP-8
SOT23-5
LLP-6
eMSOP-8
Package Drawing
MF05A
SDE06A
MUY08A
MF05A
SDE06A
MUY08A
Supplied As
1000 units tape & reel
3000 units tape & reel
1000 units tape & reel
4500 units tape & reel
1000 units tape & reel
3500 units tape & reel
1000 units tape & reel
3000 units tape & reel
1000 units tape & reel
4500 units tape & reel
1000 units tape & reel
3500 units tape & reel
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2
LM2735
Pin Description - 5-Pin SOT23
Pin
1
2
3
4
5
Name
SW
GND
FB
EN
VIN
Function
Output switch. Connect to the inductor, output diode.
Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this
pin.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN +
0.3V.
Supply voltage for power stage, and input supply voltage.
Pin Description - 6 Pin LLP
Pin
1
2
3
4
5
6
DAP
Name
PGND
VIN
EN
FB
AGND
SW
GND
Function
Power ground pin. Place PGND and output capacitor GND close together.
Supply voltage for power stage, and input supply voltage.
Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN +
0.3V.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Signal ground pin. Place the bottom resistor of the feedback network as close as possible to this pin & pin
4.
Output switch. Connect to the inductor, output diode.
Signal & Power ground. Connect to pin 1 & pin 5 on top layer. Place 4-6 vias from DAP to bottom layer GND
plane.
Pin Description - 8 Pin eMSOP
Pin
1
2
3
4
5
6
7
8
DAP
GND
PGND
VIN
EN
FB
AGND
SW
Name
Function
No Connect
Power ground pin. Place PGND and output capacitor GND close together.
Supply voltage for power stage, and input supply voltage.
Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN +
0.3V.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Signal ground pin. Place the bottom resistor of the feedback network as close as possible to this pin & pin 5
Output switch. Connect to the inductor, output diode.
No Connect
Signal & Power ground. Connect to pin 2 & pin 6 on top layer. Place 4-6 vias from DAP to bottom layer GND
plane.
3
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LM2735
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN
SW Voltage
FB Voltage
EN Voltage
ESD Susceptibility (Note 4)
Junction Temperature (Note 2)
Storage Temp. Range
-0.5V to 7V
-0.5V to 26.5V
-0.5V to 3.0V
-0.5V to 7.0V
2kV
150°C
-65°C to 150°C
Soldering Information
Infrared/Convection Reflow (15sec)
220°C
Operating Ratings
V
IN
V
SW
V
EN
(Note 5)
Junction Temperature Range
Power Dissipation
(Internal) SOT23-5
(Note 1)
2.7V to 5.5V
3V to 24V
0V to V
IN
−40°C to +125°C
400 mW
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only; limits in
boldface type
apply over the
junction temperature range of (T
J
= -40°C to 125°C). Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only.
V
IN
= 5V unless otherwise indicated under the Conditions column.
Symbol
Parameter
Conditions
−40°C
≤
to T
J
≤
+125°C (SOT23-5)
0°C
≤
to T
J
≤
+125°C (SOT23-5)
V
FB
Feedback Voltage
−40°C
≤
to T
J
≤
+125°C (LLP-6)
−0°C
≤
to T
J
≤
+125°C (LLP-6)
−40°C
≤
to T
J
≤
+125°C (eMSOP-8)
0°C
≤
to T
J
≤
+125°C (eMSOP-8)
ΔV
FB
/V
IN
I
FB
F
SW
D
MAX
D
MIN
R
DS(ON)
I
CL
SS
I
Q
Feedback Voltage Line Regulation
Feedback Input Bias Current
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Switch On Resistance
Switch Current Limit
Soft Start
Quiescent Current (switching)
Quiescent Current (shutdown)
UVLO
V
EN_TH
I
-SW
I
-EN
Undervoltage Lockout
Shutdown Threshold Voltage
Enable Threshold Voltage
Switch Leakage
Enable Pin Current
LM2735-X
LM2735-Y
All Options V
EN
= 0V
VIN Rising
VIN Falling
(Note 5)
(Note 5)
V
SW
= 24V
Sink/Source
1.8
1.0
100
1.7
LM2735-X
LM2735-Y
LM2735-X
LM2735-Y
LM2735-X
LM2735-Y
SOT23-5 and eMSOP-8
LLP-6
2.1
1200
360
88
91
V
IN
= 2.7V to 5.5V
Min
Typ
Max
1.280
1.274
1.285
1.281
1.290
1.280
%/V
1
2000
680
%
%
330
350
mΩ
A
ms
11
7
nA
2.65
0.4
V
mA
µA
kHz
V
Units
1.230
1.255
1.236
1.255
1.225
1.255
1.229
1.255
1.220
1.255
1.230
1.255
0.06
0.1
1600
520
96
99
5
2
170
190
3
4
7.0
3.4
80
2.3
1.9
V
µA
nA
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4
LM2735
Symbol
θ
JA
θ
JC
T
SD
Parameter
Junction to Ambient
0 LFPM Air Flow (Note 3)
Junction to Case (Note 3)
Thermal Shutdown Temperature (Note 2)
Thermal Shutdown Hysteresis
Conditions
LLP-6 and eMSOP-8 Package
SOT23-5 Package
LLP-6 and eMSOP-8 Package
SOT23-5 Package
Min
Typ
80
118
18
60
160
10
Max
Units
°C/W
°C/W
°C
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see Electrical Characteristics.
Note 2:
Thermal shutdown will occur if the junction temperature exceeds the maximum junction temperature of the device
Note 3:
Applies for packages soldered directly onto a 3” x 3” PC board with 2oz. copper on 4 layers in still air.
Note 4:
The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 5:
Do not allow this pin to float or be greater than V
IN
+0.3V.
5
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参数对比
与LM2735XMF相近的元器件有：LM2735XMYX、LM2735YMF、LM2735YMFX、LM2735YMY、LM2735YMYX、LM2735YSD、LM2735YSDX。描述及对比如下：
型号 LM2735XMF LM2735XMYX LM2735YMF LM2735YMFX LM2735YMY LM2735YMYX LM2735YSD LM2735YSDX
描述 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator
是否Rohs认证 不符合 不符合 不符合 不符合 不符合 不符合 不符合 不符合
厂商名称 National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ） National Semiconductor（TI ）
包装说明 SOT-23, 5 PIN MSOP-8 SOT-23, 5 PIN SOT-23, 5 PIN MSOP-8 MSOP-8 LLP-6 LLP-6
Reach Compliance Code _compli _compli _compli _compli _compli _compli _compli _compli
ECCN代码 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
其他特性 ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V ALSO OPERATES IN PEAK CURRENT; ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V
模拟集成电路 - 其他类型 SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
控制模式 VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE
控制技术 PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
最大输入电压 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
最小输入电压 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V
标称输入电压 5 V 5 V 5 V 5 V 5 V 5 V 5 V 5 V
JESD-30 代码 R-PDSO-G5 S-PDSO-G8 R-PDSO-G5 R-PDSO-G5 S-PDSO-G8 S-PDSO-G8 S-XDSO-N6 S-XDSO-N6
JESD-609代码 e0 e0 e0 e0 e0 e0 e0 e0
长度 2.92 mm 3 mm 2.92 mm 2.92 mm 3 mm 3 mm 3 mm 3 mm
湿度敏感等级 1 1 1 1 1 1 1 1
功能数量 1 1 1 1 1 1 1 1
端子数量 5 8 5 5 8 8 6 6
最高工作温度 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C
最低工作温度 -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C
最大输出电流 3 A 3 A 3 A 3 A 3 A 3 A 3 A 3 A
封装主体材料 PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY UNSPECIFIED UNSPECIFIED
封装代码 TSSOP HTSSOP TSSOP TSSOP HTSSOP HTSSOP HVSON HVSON
封装等效代码 TSOP5/6,.11,37 TSSOP8,.19 TSOP5/6,.11,37 TSOP5/6,.11,37 TSSOP8,.19 TSSOP8,.19 SOLCC6,.11,37 SOLCC6,.11,37
封装形状 RECTANGULAR SQUARE RECTANGULAR RECTANGULAR SQUARE SQUARE SQUARE SQUARE
封装形式 SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度） 260 260 260 260 260 260 260 260
认证状态 Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
座面最大高度 1.19 mm 1.09 mm 1.19 mm 1.19 mm 1.09 mm 1.09 mm 0.8 mm 0.8 mm
表面贴装 YES YES YES YES YES YES YES YES
切换器配置 BOOST BOOST BOOST BOOST BOOST BOOST BOOST BOOST
最大切换频率 2000 kHz 2000 kHz 680 kHz 680 kHz 680 kHz 680 kHz 680 kHz 680 kHz
温度等级 AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
端子面层 Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn/Pb) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15)
端子形式 GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING NO LEAD NO LEAD
端子节距 0.953 mm 0.65 mm 0.953 mm 0.953 mm 0.65 mm 0.65 mm 0.95 mm 0.95 mm
端子位置 DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL
处于峰值回流温度下的最长时间 40 40 40 40 40 40 40 40
宽度 1.6 mm 3 mm 1.6 mm 1.6 mm 3 mm 3 mm 3 mm 3 mm
Is Samacsys - - N N N N N N
Base Number Matches - - 1 1 1 1 1 1
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器件捷径:
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