ML63271ATB [MINILOGIC]
DC-DC Converter; DC-DC变换器
| 型号： | ML63271ATB |
| 厂家： | 
MINILOGIC DEVICE CORPORATION LIMITED |
| 描述： | DC-DC Converter |
| 文件： | 总5页 (文件大小：179K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ML63
ML63 Series DC-DC Converter
v Application
v Features
l Small number of external components: inductor, diode and
capacitor.
l Ultra low input current : Typical 0.6uA (at no load, 1.5V
input)
l Oscillator : 100 kHz, 180 kHz ( + 15%)
l Low ripple and noise
u Power Source of Portable Products
u Palmtops
u Portable Cameras and Video Recorders
u Wireless mouse and keyboard
l Low startup voltage : Max 0.9V (with 1mA input)
l High Efficiency: Typical 80%
l Package Available:
SOT- 89 (500mW) & TO - 92 (300mW)
v General Description
v Block Diagram
Lx
V
LX
limiter
The ML63 is a group of VFM Step-up DC/DC
converter IC with ultra-low supply current by
CMOS process.
Vref
LxSW
OUT
Buffer
VFM control
It consists of an oscillator, a VFM control circuit, a
Lx switch driver transistor, a reference voltage unit,
an error amplifier for voltage detection and an Lx
switch protection circuit. It is suitable for use with
battery-powered instruments with low noise and
ultra low supply current.
Vss
OSC
100KHz/180KHz
Error Amp.
v Absolute Maximum Ratings
Parameter
Input Voltage
Output Current
Output Voltage
Symbol
VIN
Ratings
Units
V
mA
V
8
500
IOUT
VOUT
VSS-0.3 ~VIN+0.3
Continuous
SOT-89
500
Pd
mW
Total Power
Dissipation
TO-92
300
Operating Ambient
Temperature
Storage Temperature
Topr
Tstg
-30 ~ +80
oC
oC
-40 ~ +125
1/5
ML63
v Electrical Characteristics
VIN = 1.6V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided.
ML63271 / ML63271A VOUT=2.7V
Parameter
Symbol
VOUT
Conditions
Min
Typ
Max
Units
V
V
Output Voltage
Startup Voltage
Hold-on Voltage
2.633 2.700 2.767
VSTART
VHOLD
IOUT=1mA
IOUT=1mA
TYPE = ML63271A
TYPE = ML63271
At no load
0.8
0.9
0.7
85
153
V
100
180
8
115
207
12
KHz
KHz
uA
uA
mA
uA
%
Oscillator Frequency
FOSC
Input Current 1
Input Current 2
IIN1
IIN2
VIN = 3.2V
6
Lx Switching Current
Lx Leakage Current
Oscillator Duty Cycle
Efficiency
ILX
VLX=0.4V, VIN=2.55V
VIN=3.5V, VLX=6.0V
Measuring Lx Waveform
40
ILXLEAK
MAXDTY
EFF
0.5
8
75
80
%
V
Input Voltage
VIN
VIN = 1.8V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided.
ML63301 / ML63301A VOUT=3.0V
Parameter
Symbol
VOUT
Conditions
Min
Typ
Max
Units
V
V
Output Voltage
Startup Voltage
Hold-on Voltage
2.925 3.000 3.075
VSTART
VHOLD
IOUT=1mA
IOUT=1mA
TYPE = ML63301A
TYPE = ML63301
At no load
0.8
0.9
0.7
85
153
V
100
180
8
115
207
12
KHz
KHz
uA
uA
mA
uA
%
Oscillator Frequency
FOSC
Input Current 1
Input Current 2
IIN1
IIN2
VIN = 3.5V
6
Lx Switching Current
Lx Leakage Current
Oscillator Duty Cycle
Efficiency
ILX
VLX=0.4V, VIN=2.85V
VIN=3.5V, VLX=6.0V
Measuring Lx Waveform
40
ILXLEAK
MAXDTY
EFF
0.5
8
75
80
%
V
Input Voltage
VIN
VIN = 1.8V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided.
ML63501
VOUT=5.0V
Parameter
Symbol
VOUT
Conditions
Min
Typ
Max
Units
V
V
Output Voltage
Startup Voltage
Hold-on Voltage
Oscillator Frequency
Input Current 1
4.925 5.000 5.075
VSTART
VHOLD
FOSC
IIN1
IIN2
IOUT=1mA
IOUT=1mA
0.8
0.9
0.7
85
V
100
8
6
115
12
KHz
uA
uA
mA
uA
%
At no load
VIN = 3.5V
VLX=0.4V, VIN=2.85V
VIN=3.5V, VLX=6.0V
Measuring Lx Waveform
Input Current 2
Lx Switching Current
Lx Leakage Current
Oscillator Duty Cycle
Efficiency
ILX
40
ILXLEAK
MAXDTY
EFF
0.5
8
75
80
%
V
Input Voltage
VIN
2/5
ML63
v Pin Configuration
SOT-89 :
Pin Number Pin Name
Description
1
2
3
VSS
VOUT
Lx
Ground
Voltage Output/Internal power supply
Switch
TO-92 :
Pin Number Pin Name
Description
1
2
3
VSS
VOUT
Lx
Ground
Voltage Output/Internal power supply
Switch
v Application Notes
Note on Use
1. It is recommended to use capacitor with a capacity of 10uF or more for good frequency characteristics, otherwise it will lead
to high output ripple. Tantalum type capacitor is recommended. As there may be the case where a spike-shaped high voltage
is generated by the inductor when Lx transistor is turned off, the operating voltage of capacitor should be at least three times
of the output set voltage so as to avoid over-voltage damage.
2. It is recommended to use inductor has sufficiently small d.c. resistance, large allowable current and hardly reaches magnetic
saturation. When the inductance of inductor is small, there may be the case that the inductor current exceeds the absolute
maximum ratings at the maximum load condition.
3. It is recommended to place external components as close as possible to the DC/CD converter so as to minimize the
interconnection parasitic between components and DC/DC converter, especially for the capacitor connected to VOUT pin. It
is recommended to place 0.1uF ceramic capacitor between VOUT pin and VSS pin.
4. It is recommended to provide sufficient grounding for VSS pin. This will help to stable the zero level within DC/DC
converter induced by the switching current level variation during operation. And the insufficient grounding may result in
unstable operation of DC/DC converter.
3/5
ML63
Typical Application Circuit
1. Step-up Circuit
Typical Value:
Inductor: 270uH
Capacitor: Aluminium type, 4.7uF.
Diode: Schottky Diode with forward
voltage drop of 0.2V or less
2. Step-down Circuit
3. Step-up/Step-down Circuit
Note : The starter circuit is necessary for above circuits.
4/5
ML63
v Ordering Information
Designator
Description
Output Voltage
eg.
27=2.7V
30=3.0V
50=5.0V
a
Oscillator Frequency
1 = 180KHz
1A = 100KHz
Package Type
P = SOT-89
b
c
T = TO-92
Device Orientation
R = Embossed Tape
(Orientation of Device : Right)
L = Embossed Tape
(Orientation of Device : Left)
B = Bag (TO-92)
d
v History of Revision
REV
DESCRIPTION
First Official Specification
DATE
23/10/02
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and
reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use.
5/5
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