ML65
ML65 Series DC-DC Converter
Application Features
Small number of external components: inductor, diode and
capacitor.
Ultra low input current : Typical 6uA Output Voltage Accuracy : +/- 2.5 % Low ripple and noise
Low startup voltage : Max 0.9V (with 1mA input) High Efficiency: Typical 80%
Package Available:
SOT- 89 (500mW), SOT-23 (150mW) & TO - 92 (300mW)
Power Source of Portable Products Palmtops
Portable Cameras and Video Recorders Wireless mouse and keyboard
Ordering Information
Designator
a b
c d
ML65 Version ML65A
Description Version
Output Voltage eg. 30=3.0V
Package Type P = SOT-89 M = SOT-23 T = TO-92
Device Orientation R = Embossed Tape
(Orientation of Device : Right) L = Embossed Tape
(Orientation of Device : Left) B = Bag (TO-92) Package Designator
M P T M P T M P M P M P M P
Switching Transistor Build-in Transistor External Transistor Build-in Transistor External Transistor Build-in Transistor Build-in Transistor
General Description
The ML65 is a group of PWM Step-up DC/DC converter IC with ultra-low supply current by CMOS process.
It consists of an oscillator, a PWM 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.
CE Function No
VDD Pin No
FB Pin No
Features Lx
33=3.3V 50=5.0V
Package SOT23-3 SOT89-3 TO-92 SOT23-3 SOT89-3 TO-92 SOT23-5 SOT89-5 SOT23-5 SOT89-5 SOT23-5 SOT89-5 SOT23-5 SOT89-5
ML65B ML65C ML65D ML65E ML65F
No Yes Yes No No
No No No Yes Yes
No No No No Yes
Ext Lx+CE Ext+CE Lx+VDD FB
P1/10
Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
ML65A
Pin Configuration
Package Pin Number
SOT23-3 SOT89-3 TO-92
1 1 1 3 2 2 2 3 3
Pin Name VSS
VOUT LX
Function
Ground
Output Voltage monitor, Internal IC Power Supply
Switch
Block Diagram
Typical Applications
P2/10 Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
ML65B
Pin Configuration
Package Pin Number
SOT23-3 SOT89-3 TO-92
1 1 1 3 2 2 2 3 3
Pin Name VSS
VOUT EXT
Function
Ground
Output Voltage monitor, Internal IC Power Supply
External Switch Transistor Drive
Block Diagram
Typical Applications
P3/10
Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
ML65C
Pin Configuration
Package Pin Number SOT23-5 SOT89-5
4 5 2 2 5 4 1 3 3 1 VSS
VOUT Lx CE NC
Pin Name Function
Ground
Output Voltage monitor, Internal IC Power Supply
Switch Chip Enable NC Block Diagram
Typical Applications
P4/10
Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
ML65D
Pin Configuration
Package Pin Number SOT23-5 SOT89-5
4 5 2 2 5 4 1 3 3 1 VSS
VOUT EXT CE NC
Pin Name
Function
Ground
Output Voltage monitor, Internal IC Power Supply
External Switch Transistor Drive Chip Enable NC Block Diagram
Typical Applications
P5/10
Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
ML65E
Pin Configuration
Package Pin Number SOT23-5 SOT89-5
4 5 2 2 5 4 1 3 3 1
Pin Name VSS
VDD Lx VOUT NC
Function Ground Power Supply Switch
Output Voltage Monitor
NC
Block Diagram
Typical Applications
P6/10 Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
ML65F
Pin Configuration
Package Pin Number SOT23-5 SOT89-5
4 5 2 2 5 4 1 3 3 1 Pin Name VSS
VOUT Lx FB NC Function Ground Power Supply Switch Feedback NC
Block Diagram
Typical Applications
P7/10
Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
Absolute Maximum Ratings
Parameter Input Voltage VDD Input Voltage Lx Pin Voltage EXT Pin Voltage CE Pin Voltage Lx Pin Current EXT Pin Current
SOT-89
Continuous
TO-92 Total Power
Dissipation
SOT-23
Operating Ambient Temperature
Storage Temperature Symbol VIN VDD VLX VEXT VCE ILX IEXT Pd
Ratings 10 10 10
-0.3 ~ VOUT + 0.3 -0.3 ~ VOUT + 0.3
600 + 30 500
300 150
Units V V V V V mA mA mW
Topr Tstg -25 ~ +85 -40 ~ +125 ooC C Electrical Characteristics
VIN = VOUT * 0.6, VSS = 0V, IOUT = 10mA, Ta = 25 oC, unless otherwise specified.
Parameter Output Voltage Input Voltage Startup Voltage Hold-on Voltage Supply Current 1 Supply Current 2 Lx Switching Current Lx Leakage Current EXT “High” On Current EXT “Low” On Current CE “High” Voltage CE “Low” Voltage CE “High” Current CE “Low” Current Oscillator Frequency
Duty Cycle Efficiency Slow-Start Time Symbol VOUT VIN VSTART VHOLD IDD1 IDD2 ILX ILXLEAK IEXTH IEXTL VCEH VCEL ICEH ICEL FOSC MAXDTY EFF TSS
IOUT = 1mA, VIN: 0→2V IOUT = 1mA, VIN: 2→0V No external component, VIN = VOUT * 0.95 VIN = VIN + 0.5V VLX = 0.4V, VIN = VOUT * 0.95 VIN =VLX=6.0V No external component, VIN = VOUT * 0.95, VEXT = VOUT – 0.4V
No external component, VIN = VOUT * 0.95, VEXT = 0.4V
VIN = VOUT * 0.95 VIN = VOUT * 0.95
VOUT = 6.0V, VCE = 6.0V VOUT = 6.0V, VCE = 0.0V
Conditions
Min Typ Max Units Vout * Vout * Vout V
0.975 1.025 8 V 0.8 0.9 V 0.7 V 0.7 80 5 30~70
uA uA mA uA mA mA V V uA uA KHz % % ms 11~26 250 0.5 -5.5 13
0.2 0.25 -0.25 100 87 92 85 15 25 Note : 1. Schokkty diode: 1N5817 or 1N5819 (forward voltage drop : 0.2V)
2. Inductor : 47uH (ESR < 0.5Ω)
3. Capacitor : Tantalum type, 47 uF
P8/10
Rev. B, July 2005
元器件交易网www.cecb2b.com
ML65
Electrical Characteristics
Max Units 3.075 V 8 V 0.9 V V uA uA mA 0.5 uA 150 KHz 92 % % 25 ms ML65A30 VOUT = 3.0V VIN = 1.8V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided.
Parameter Symbol Conditions Min Typ Output Voltage VOUT 2.925 3.000 Input Voltage VIN Startup Voltage VSTART IOUT = 1mA 0.8 Hold-on Voltage VHOLD IOUT = 1mA 0.7 Supply Current 1 IDD1 VIN = 2.85V 30 Supply Current 2 IDD2 VIN = 3.05V 11 Lx Switching Current ILX VLX=0.4V, VIN=2.85V 250 Lx Leakage Current ILXLEAK VIN=6.0V, VLX=6.0V Oscillator Frequency FOSC 100 Oscillator Duty Cycle MAXDTY 80 87 Efficiency EFF 85 Slow –Start Time TSS 5 15 ML65A33 VOUT = 3.3V VIN = 2.0V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided.
Parameter Symbol Conditions Min Typ Output Voltage VOUT 3.218 3.300 Input Voltage VIN Startup Voltage VSTART IOUT = 1mA 0.8 Hold-on Voltage VHOLD IOUT = 1mA 0.7 Supply Current 1 IDD1 VIN = 3.135V 33 Supply Current 2 IDD2 VIN = 3.35V 12 Lx Switching Current ILX VLX=0.4V, VIN=3.135V 260 Lx Leakage Current ILXLEAK VIN=6.0V, VLX=6.0V Oscillator Frequency FOSC 100 Oscillator Duty Cycle MAXDTY 80 87
Efficiency EFF 85 Slow –Start Time TSS 5 15
ML65A50 VOUT = 5.0V VIN = 3.0V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided.
Parameter Symbol Conditions Min Typ Output Voltage VOUT 4.875 5.000 Input Voltage VIN Startup Voltage VSTART IOUT = 1mA 0.8 Hold-on Voltage VHOLD IOUT = 1mA 0.7 Supply Current 1 IDD1 VIN = 4.75V 70 Supply Current 2 IDD2 VIN = 5.05V 26 Lx Switching Current ILX VLX=0.4V, VIN= 4.75V 290 Lx Leakage Current ILXLEAK VIN=6.0V, VLX=6.0V Oscillator Frequency FOSC 100 Oscillator Duty Cycle MAXDTY 80 87
Efficiency EFF 85 Slow –Start Time TSS 5 15 Max Units 3.383 V 8 V 0.9 V V uA uA mA 0.5 uA 150 KHz 92 % % 25 ms Max Units 5.125 V 8 V 0.9 V V uA uA mA 0.5 uA 150 KHz 92 % % 25 ms P9/10 Rev. B, July 2005
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ML65
Application Notes
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/DC 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.
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.
P10/10
Rev. B, July 2005
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