YOUDA INTEGRATED CIRCUIT
YD34063
DC TO DC CONVERTER CONTROLLER--YD34063
DESCRIPTION
The YD34063 is a monolithic regulator subsystem intended for use as DC to DC converter: This device contains
a temperature compensated band-gap reference, a duty-cycle control oscillator, driver and high current output switch.
FEATURES
*Operation From 3.0V to 40V
*Short Circuit Current Limiting
*Low Standby Current
*Output Switch Current Of 1.5A Without External Transistors
*Frequency Of Operation From 100Hz to 100kHz
*Step-up, Step-down or Inverting Switch Regulators
BLOCK DIAGRAM
T1
T2
1
2
3
4
8
7
6
5
Q
S
R
1.25Vref
+
-
COMP.
D
B
A
CT
C
IS
OSCILLATOR
E
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel 86-755-83740369 Fax 86-755-83741418
Ver 5.0 1 of 4 2006-7-10
YOUDA INTEGRATED CIRCUIT
YD34063
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
40
V
Comparator Input Voltage Range
Vi(comp)
-0.3 +40
V
Switch Collector Voltage
Vc(sw)
40
V
Switch Emitter Voltage
Ve(sw)
40
V
Switch Collector to Emitter Voltage
Vce(sw)
40
V
Driver Collector Voltage
Vc(dr)
40
V
Driver Collector Current Ic -55100 mA
Switch Current
Isw
1.5 A
Power Dissipation
P
D
1.25
W
Operating Junction Temperature
Tj
150
Operating Temperature
Tamb
070
Storage Temperature
Tstg
-65150
ELECTRICAL CHARACTERISTICS
(Tamb=070, Vcc=5.0V, Unless otherwise specified)
PARAMETER SYMBOL TEST
CONDITIONS MIN
TYP
MAX
UNIT
Oscillator
Frequency f
OSC
Vpin=0V,
C
T
=1.0
24 33 42 kHz
Charging Current
Ichq
Vpin5=5 to 40V
24
35
42
A
Discharging Current
Idischg
Vpin5=5 to 40V
140
190
260
A
Discharge to Charge
Current Ratio
K
V7=Vcc
5.2 6.1 7.5
Current Limit Sense
Voltage
V
IPK
250 300 350 mV
Output Switch
Saturation Voltage
Vce(sat)
Isw=1.0A Vc(driver)=Vc(sw)
1.0
1.3
V
Saturation Voltage
Vce(sat)
Isw=1.0A Vc(driver)=50mA
0.45
0.7
V
DC Current Gain
h
FE
Isw=1.0A,
Vce=5.0V
50
120
Collector OFF Current
Ic(off) Vce=40.0V
0.01
100
A
Tamb=25 1.225
1.25
1.275
Threshold Voltage
Vth
Tamb=070 1.21
1.29
V
Threshold Voltage
Line Regulation
Reg Vcc=3.040V
1.4
5.0
mV
Input Bias Current
I
IB
Vin=0V
-40
-400
nA
WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
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