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ML65
ML65 Series DC-DC Converter Application
Power Source of Portable Products Palmtops Portable Cameras and Video Recorders Wireless mouse and keyboard
Features
Small number of external components: inductor, diode and capacitor. Ultra low input current : Typical 6uA Output V oltage Accuracy : +/- 2.5 % Low ripple and noise Low startup voltage : Max 0.9V (with 1mA input) High Efficiency: Typical 80% PackageAvailable: SOT- 89 (500mW), SOT-23 (150mW) & TO - 92 (300mW)
Ordering Information
Designator a b
Description Version Output Voltage eg. 30=3.0V
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.
33=3.3V 50=5.0V
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
c
d
ML65 Version ML65A
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
CE Function No
VDD Pin No
FB Pin No
Features Lx
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
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
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
ML65
ML65C
Pin Configuration
Package Pin Number SOT23-5 SOT89-5 4 5 2 2 5 4 1 3 3 1
Pin Name VSS VOUT Lx CE NC
Function Ground Output Voltage monitor, Internal IC Power Supply Switch Chip Enable NC
Block Diagram
Typical Applications
P4/10
Rev. B, July 2005
ML65
ML65D
Pin Configuration
Package Pin Number SOT23-5 SOT89-5 4 5 2 2 5 4 1 3 3 1
Pin Name VSS VOUT EXT CE NC
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
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
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
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 Topr Tstg -25 ~ +85 -40 ~ +125
o o
Units V V V V V mA mA mW
C 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 Symbol VOUT VIN VSTART VHOLD IDD1 IDD2 ILX ILXLEAK IEXTH IOUT = 1mA, VIN: 02V IOUT = 1mA, VIN: 20V 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 30~70 11~26 250 0.5 -5.5 uA uA mA uA mA
EXT "Low" On Current CE "High" Voltage CE "Low" Voltage CE "High" Current CE "Low" Current Oscillator Frequency Duty Cycle Efficiency Slow-Start Time
IEXTL VCEH VCEL ICEH ICEL FOSC MAXDTY EFF TSS
13 0.7 0.2 0.25 -0.25 80 5 100 87 85 15 92 25
mA V V uA uA KHz % % ms
Note : 1. Schokkty diode: 1N5817 or 1N5819 (forward voltage drop : 0.2V) 2. Inductor : 47uH (ESR < 0.5) 3. Capacitor : Tantalum type, 47 uF
P8/10
Rev. B, July 2005
ML65
Electrical Characteristics
ML65A30 VOUT = 3.0V Parameter Output Voltage Input Voltage Startup Voltage Hold-on Voltage Supply Current 1 Supply Current 2 Lx Switching Current Lx Leakage Current Oscillator Frequency Oscillator Duty Cycle Efficiency Slow -Start Time VIN = 1.8V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided. Symbol Conditions Min Typ Max VOUT 2.925 3.000 3.075 VIN 8 VSTART IOUT = 1mA 0.8 0.9 VHOLD IOUT = 1mA 0.7 IDD1 VIN = 2.85V 30 IDD2 VIN = 3.05V 11 ILX VLX=0.4V, VIN=2.85V 250 ILXLEAK VIN=6.0V, VLX=6.0V 0.5 FOSC 100 150 MAXDTY 80 87 92 EFF 85 TSS 5 15 25 Units V V V V uA uA mA uA KHz % % ms
ML65A33 VOUT = 3.3V VIN = 2.0V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided. Parameter Symbol Conditions Min Typ Max Output Voltage VOUT 3.218 3.300 3.383 Input Voltage VIN 8 Startup Voltage VSTART IOUT = 1mA 0.8 0.9 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 0.5 Oscillator Frequency FOSC 100 150 Oscillator Duty Cycle MAXDTY 80 87 92 Efficiency EFF 85 Slow -Start Time TSS 5 15 25 ML65A50 VOUT = 5.0V VIN = 3.0V, IOUT = 10mA, Ta = 25 oC, unless otherwise provided. Parameter Symbol Conditions Min Output Voltage VOUT 4.875 Input Voltage VIN Startup Voltage VSTART IOUT = 1mA Hold-on Voltage VHOLD IOUT = 1mA 0.7 Supply Current 1 IDD1 VIN = 4.75V Supply Current 2 IDD2 VIN = 5.05V Lx Switching Current ILX VLX=0.4V, VIN= 4.75V Lx Leakage Current ILXLEAK VIN=6.0V, VLX=6.0V Oscillator Frequency FOSC Oscillator Duty Cycle MAXDTY 80 Efficiency EFF Slow -Start Time TSS 5
Units V V V V uA uA mA uA KHz % % ms
Typ Max 5.000 5.125 8 0.8 0.9 70 26 290 100 87 85 15 0.5 150 92 25
Units V V V V uA uA mA uA KHz % % ms
P9/10
Rev. B, July 2005
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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