LV5808MX-TLM-H [ONSEMI]
Step-Down Switching Regulator, 1000-REEL;
| 型号： | LV5808MX-TLM-H |
| 厂家： | 
ONSEMI |
| 描述： | Step-Down Switching Regulator, 1000-REEL 信息通信管理 光电二极管 |
| 文件： | 总5页 (文件大小：119K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA1607
Bi-CMOS IC
Step-down Switching Regulator
LV5808MX
Overview
LV5808MX is a 1ch step-down switching regulator. 0.3Ω FET is incorporated on the upper side to achieve high-efficiency
operation for large output current. Low-heat resistance and compact-package MFP8 (200mil) employed. Current mode
control type, with superior load current response and easy phase compensation ON/OFF pin, allowing the standby mode
with the current drain of 100μA or less Pulse-by-pulse over-current protection and overheat protection available for
protection of load devices Soft start pin to be provided with a capacitance for soft start.
Functions
• 2A 1ch step-down switching regulator
• Wide input dynamic range (to 28V)
• Thermal shutdown
• Reference voltage: 0.8V
• Fixed frequency: 370kHz
• Soft start
• High efficiency (90% I
• Standby mode
= 1A, V = 12V, V = 5V)
OUT
IN
O
• Over-current protection
• Compact package: MFP8 (200mil) with heat sink
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum input V voltage
IN
V
V
V
V
max
max
max
32
37
V
V
IN
BOOT pin maximum voltage
SW pin maximum voltage
BOOT pin-SW pin maximum voltage
FB, COMP, SS pin maximum voltage
Allowable power dissipation
Junction temperature
BT
V
max
7
V
SW
IN
max
V
BS-SW
Vfs max
Pd max
Tj max
Topr
7
V
Mount on a specified board *
2.05
150
W
°C
°C
°C
Operating temperature
-20 to 80
Storage temperature
Tstg
-40 to 150
Note: Plan the maximum voltage while including coil and surge voltages, so that the maximum voltage is not exceeded even for an instant.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
's products or
equipment.
O2809 SY 20091023-S00006 No.A1607-1/5
LV5808MX
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
V
pin voltage
V
V
V
V
8 to 28
IN
IN
BOOT pin voltage
SW pin voltage
-0.3 to 33
V
BT
-0.4 to V
IN
V
SW
BOOT pin-SW pin maximum
voltage
6.5
V
BS-SW
FB, COMP, SS pin voltage
V
6
V
FSO
Electrical Characteristics at Ta = 25°C, V = 12V, unless otherwise specified.
IN
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
IC current drain at standby
IC current drain in operation
Efficiency
I
I
1
2
EN=0V
70
μA
mA
%
CC
EN=open
5
90
CC
Effcy
Vref
V
V
=12V, I
=1A, Vo=5V, Design target *1
IN
IN
OUT
Reference voltage
=8V to 28V (±2%)
-2%
0.8
10
+2%
100
V
FB pin bias current
Iref
FB=0.8V application
BOOT=5V
nA
Ω
High-side ON resistance
Low-side ON resistance
Oscillation frequency
RonH
RonL
0.3
6
Ω
f
296
22
370
32
444
42
kHz
kHz
OSC
Oscillation frequency during
short-circuit protection
f
OSCS
EN high-threshold voltage
Venh
Venl
Ien
1.9
V
V
EN low-threshold voltage
EN pull-up current
0.8
3
EN=0V
16
80
μA
%
A
Maximum ON DUTY
D max
Icl1
Current limit peak value 1
Thermal shutdown temperature
V
=12V, V
=5V, L=10μH
OUT
IN
Ttsd
Dtsd
*Design guarantee *2
*Design guarantee *2
160
40
°C
°C
Thermal shutdown temperature
hysteresis
Soft start current
I
SS=0V
6
10
14
μA
SS
*1: Reference value (not tested before shipment)
*2: Design guarantee (value guaranteed by design and not tested before shipment)
No.A1607-2/5
LV5808MX
Package Dimensions
unit : mm (typ)
3372
Pd max -- Ta
2.5
2.0
1.5
1.0
0.5
0
TOP VIEW
SIDE VIEW
BOTTOM VIEW
5.0
2.05
(3.4)
8
1.15
1
2
0.35
0.15
(0.65)
1.27
SIDE VIEW
-20
0
20
40
60
80
100
Ambient temperature, Ta -- ∞C
SANYO : MFP8(200mil)
Pin Assignment
BOOT
1
2
3
4
8
7
6
5
SS
V
EN
IN
SW
COMP
FB
GND
Top view
Block Diagram and Sample Application Circuit (3.3V output)
BOOT (SW + Vreg.)
BOOT
V
=12V
IN
Current Sense
Amp.
Rb=0
+
Pre-Drive
UVLO
V
=3.3V
1:N
SW
OUT
-
-
OSC
370kHz
Error
Amp.
PWM
comparator
Pre-Drive
+
+
FB
GND
COMP
+
-
Current
Limit Logic
C3=5800pF
Internal Stable
supply
SS
EN
V
IN
Vref
0.8V
Internal
Regulator
TSD
Internal Regulator
(5V)
H:ON
L or open:OFF
C1,C8,C5,C9 = Ceramic capacitor
L1=CDRH105RNP-100NC(sumida)
No.A1607-3/5
LV5808MX
Pin Function
Pin No.
Pin name
Function
Equivalent circuit
1
BOOT
Upper MOS transistor boot strap capacitance connection pin.
Connect the boot capacitance of about 0.022μF between SW
pins.
V
IN
BOOT
To protect the SW pin’s absolute maximum rating, to ensure
stable operation, and to eliminate noise, the boot capacitance
serial resistance (about 100Ω) Rb proves effective.
High side MOS
2
3
V
Input voltage pin.
IN
Connect substantially large (20μF or more) capacitance
between this pin and GND.
SW
SW
Power switch pin.
Low side MOS
Connect the output LC filter. Connect the above capacitance
between this pin and BOOT pin.
4
5
GND
FB
Ground pin.
Feedback pin.
Sets the output voltage by means of split resistor in the section
of the output voltage V
as calculated below:
- FB - GND. V setting is made
OUT
OUT
(R1 + R10)
R3
V
= Vref × { 1 +
}
OUT
V
IN
Vref = 0.8V
Example: 3.3V output voltage
Internal regulation line
(See Block Diagram and Sample Application Circuit)
(27k + 4.3k)
10μA
V
= Vref × { 1 +
}
OUT
10k
=3.304V
8
SS
Soft start pin.
Sets the soft start time by means of the built-in 10μA source
voltage and external soft start capacity. The soft start capacity
C6 can be set as follows:
SS
FB
VREF
0.8V
Tss
C6 = 10μA ×
Vref
Where, Tss is the soft start time and Vref is the reference
voltage.
Example: 1.2ms soft start time achieved
1.2ms
0.8V
C6 = 10μA ×
= 0.015μF
6
COMP
Phase compensation pin.
Connects with the phase compensation external capacitance
and resistance of DC/DC converter close loop.
Internal regulation line
V
IN
Clump circuit
COMP
7
EN
Enable pin.
V
IN
Converter enabled when set to the HIGH voltage and disabled
when LOW voltage or OPEN state.
EN
2pF
Q117
No.A1607-4/5
LV5808MX
Considerations for the design
• Insertion of serial beads in the Schottky diode for removal of noise may cause generation of the negative voltage
deviating from the absolute maximum rating at the SW pin, resulting in failure of normal operation. In such an event,
do not insert beads as above described and, instead, remove noise by means of the BOOT resistance Rb.
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the authorities concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise,
without the prior written consent of SANYO Semiconductor Co.,Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of October, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1607-5/5
相关型号：
©2020 ICPDF网 联系我们和版权申明