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4. Pin Function Description 1.General Description
MDT763320 MDT763320 is a step-up DC/DC converter ith supply oltage etector. w v d It has low start-up oltage and a high v output oltage accuracy ith low ripple. v w Theeice generates dv a low level signal henever the input w oltage supply oltage) alls elow v ( v f b threshold oltage level 2.0. v ( )v VSS 1 CP 2 VDET 3 VIN 4 in ae P Nm SV CP O/I O/I Ground xternal apacitor or E c f adjusting VDET output delay time 8 LX 7 ETR 6 CE 5 VOUT ntion uF c
2. Features
VDET

igh output oltage accuracyG-/+ 2.5% H v Low start-up voltage: 0.75V (Typ.) igh eficiency: 85% Tp.) H f (y
Open Supply voltage Drain detector. Output low if Vin < 2.0V. Input Supply voltage input Open Switching pin Drain Output External switch transistor drive Input Input Chip enable pin, high active Output voltage monitor, IC internal power supply
VIN LX ETR CE VOUT
3. Applications

Cellular phones, pagers, mcu Power ailure etection f d Portable / BatteryPowered Equipment Palmtops RF eoard / Mouse K by
ORDERING INFORMATION Dev ice MDT763320P MDT763320S Package DIP OP S
This specification are subject to be changed without notice. Any latest information please preview P.1 2006/11 http;//www.mdtic.com.tw
Ver 1.1
5. Electrical Characteristics
Parameter Output Voltage Output Ripple Vin Vstart Vhold Iin Supply Current IDD1 Test Conditions ---------------------------------------------Iout=1mA Iout=30mA Iout=1mA Iout=30mA Without loading VIN=VOUT x 0.95 Measured at VOUT pin without external component VIN=VOUT+0.5V Measured at VOUT pin without external component VCE=0 , VIN=VOUTx0.95 VIN=6V VIN=VOUT0.95 Measured at ETR pin VIN=VOUT_0.95 Measured at ETR pin VIN: HI to LOW Min. 3.225 Typ. 3.3 2.5 0.75 1 0.7 0.9 20 45 25 52 Max. 3.375 3 6 0.8 1.2 Unit V % V V V V V uA uA
Supply Current IDD2
8
12
uA
Shutdown Current LX Leakage Current Maximum Oscillator Frequency Oscillator Duty Cycle
200 70 75
0.5 1 230 80
uA uA kHz % V V %
1.9 2.0 2.1 Low Battery Detect Voltage (LBDV) 0.1 LBDV hysteresis -----------------Width 85 Efficiency L , SD , CL etc. connected +3.3V Output Type VIN=VOUTx0.6 ; IOUT=30mA ; Ta=25J (Unless otherwise specified)
Note: " Supply current 1 " is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates. The current actually provided by an external VIN source from VOUT pin. " Supply current 2 " is the supply current while the oscillator stop oscillating. In actual operation the oscillator periodically operates. The current actually provided by an external VIN source from VOUT pin
This specification are subject to be changed without notice. Any latest information please preview P.2 2006/11 http;//www.mdtic.com.tw
Ver 1.1
6.Application Circuit & Block Diagram
This specification are subject to be changed without notice. Any latest information please preview P.3 2006/11 http;//www.mdtic.com.tw
Ver 1.1
EXTERNAL COMPONENT : CP=22uF ; CIN=100uF ; CL=100uF ; Cb=0.1uF L=100uH ; RPU=47K
External Transistor application ------using N-Channel Power MOS FET(1A)
This specification are subject to be changed without notice. Any latest information please preview P.4 2006/11 http;//www.mdtic.com.tw
Ver 1.1
7.TYPICAL PERFOMACE OF EFFICIENCY
EFFICIEN CY 100 09 80 70 60 50 40 30 20 10 0 5 10 1 5 20 2 5 30 3 5 40 4 5 50 5 5 60 6 5 70 7 5 80 8 5 9 0 9 5 10 0 mA
2.0V 1.8V 1.5V 1.2V .V 09
8. OUTPUT VOLTAGE V.S LOADING
LOADING v.s OUTPUT VLOTAGE 3.5 3.25 3 2.75 2.5 2.25 2 1.75 1.5 1.25 1 10 20 30 40 50 mA 60 70 80 09 100
%
2.0V 1.8V 1.5 1.2 .V 09
This specification are subject to be changed without notice. Any latest information please preview P.5 2006/11 http;//www.mdtic.com.tw
V
Ver 1.1

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