1.5A DC-to-DC CONVERTER CONTROL CIRCUIT Power Management Power Ma
|
|
|
Top Searches for this datasheet
GM34063/ GM34063E
1.5A DC-to-DC CONVERTER CONTROL CIRCUIT
Power Management Power Management
GM34063 functions required DC-toDC converters: internal temperature- compensated reference, comparator, controlled duty cycle oscillator with active current limit circuit, driver, highcurrent output switch. GM34063 designed step-down, step-up voltage-inverting applications using minimum number external components.
Features
3.0V input Adjustable Output Voltage Current Limiting Output Switch Current 1.5A Standby Current Operating Frequency 100kHz Precision Reference
Application
CD-ROM Motherboards SMPS Power Supply Battery Chargers Modem
Driver Collector Sense Oscillator
Switch Collector
Switch Emitter
Comparator 1.25V Reference Regulator
Timing Capacitor
Comparator Inverting Input (Bottom View) GM34063 active transistors on-chip.
www.gammamicro.com
PRELIMINARY
GM34063/ GM34063E
Revision May. 2004
SCHEMATIC DIAGRAM
GM34063/ GM34063E
MARKING INFORMATION CONFIGURATIONS (TOP VIEW)
SOP-8(SO
Sense Driver Collector Comparator Inventing Input Sense Driver Collector
Comparator Inventing Input
GM34063G AYWW
Switch Collector Switch Emitter
GM34063G AYWW
Timing Capacitor Switch Collector Switch Emitter
Timing Capacitor
Grade Blank Operating Ambient Temp. Range 70°C] Operating Ambient Temp. Range 125°C] Assemble Location Year Work weeks
ORDERING INFORMATION
Ordering Number Operation Ambient Temperature Range
70°C 70°C 70°C 125°C 125°C 125°C
Package
DIP-8 SO-8 SO-8 DIP-8 SO-8 SO-8
Shipping
Units/ Tube Units Tube 2,500 Units /Tape &Reel Units/ Tube Units Tube 2,500 Units /Tape &Reel
GM34063/ GM34063E
GM34063D8T GM34063S8T GM34063S8R GM34063ED8T GM34063ES8T GM34063ES8R
detail Ordering Number identification, please last page.
GM34063/ GM34063E
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VPIN1 Switch Collector Emitter Voltage Driver Collector Voltage Driver Collector Current(Note Switch Current
SYMBOL
VC(Switch) VE(Switch) VCE(Switch) VC(driver) IC(driver)
VALUE
-0.3
UNIT
Power Dissipation Thermal Characteristics Plastic Package, Suffix 25°C Thermal Resistance SOIC Package, Suffix 25°C Thermal Resistance Operating Junction Temperature Operating Ambient Temperature Range GM34063 GM34063E Storage Temperature Range
Note Maximum package power dissipation limits must observed
RqJA RqJA
1.25
°C/W °C/W
+150
TSTG
+150
GM34063/ GM34063E
+125
GM34063/ GM34063E
ELECTRICAL CHARACTERISTICS (VCC TIOW Thigh unless otherwise specified)
CHARACTERISTICS
OSCILLATOR
Frequency (Vpin5 1.0nF, 25°C) Charge Current (VCC 5.0V 40V, 25°C) Discharge Current (VCC 5.0V 40V, 25°C) Discharge Charge Current Ration (Pin 25°C) Current Limit Sense Voltage (Ichg Idischg, 25°C
Symbol
Unit
fOSC Ichg Idischg Idischg/ Ichg Vipk(sense)
OUTPUT SWITCH (Note
Saturation Voltage, Darlington Connection (ISW 1.0A, Pins connected) Saturation Voltage (Note (ISW RPins VCC, Forced Current Gain (ISW 25°C) Collector State Current (VCE
VCE(sat) VCE(sat) IC(Off)
0.45
COMPARATOR
Threshold Voltage 25°C TIOW Thigh Threshold Voltage Line Regulation (VCC 3.0V 40V) Input Bias Current (VIN
1.225 1.210 Regline 1.25 1.275 1.29 -400
GM34063/ GM34063E
TOTAL DEVICE
Supply Current (VCC 5.0V Vpin5 remaining pins open)
Note duty cycle pulse techniques used during test maintain junction temperature close ambient possible. Note output switch driven into hard saturation (non-arlington configuration) switch currents high driver currents mA), take come saturation. This condition will shorten time frequencies kHz, magnified high temperatures. This condition does occur with Darlington configuration, since output switch cannot saturate. non-Darlington configuration used, following output drive condition recommended: Forced output switch
output driver
resistor emitter driver device requires about before output switch conducts.
GM34063/ GM34063E
Typical Performance Characteristics
Saturation Voltage(V) ICC, Supply Current(mA)
Emitter current
Pin1, =VCC 25°C
VCC, Supply Voltage
Figure 1:Emitter Follows Configuration Output VCE(sat) (mV) 1000
Figure Standley Supply Current Versus Supply Voltage
Darlington Connection
VEC(sat), Saturation Voltage
Pins 25°C
Collector Current(A)
(°C)
VIPK(sense), Current Limit Sense Voltage(V)
ton-off, Output Switch on-off Time(µs)
5.0V Idischg
1000 5.0V 25°C 0.01 0.02 0.05
toff
Ambient Temperature(°C)
Oscillator Timing Capacitor(nF)
Figure Current Limit Sense Voltage versus Temperature
Figure Output Switch Time versus Oscillator Timing Capacitor
GM34063/ GM34063E
Figure Common Emitter Configuration Output Switch Saturation Voltage versus Collector Current
Figure Darlington Configuration Collector Emitter Saturation Voltage (VCE(sat)) Temperature
GM34063/ GM34063E
Figure External Current Boost Connections Peak Greater than 1.5A
Test
Line Regulation Load Regulation Output Ripple Efficiency Output Ripple With Optional Fitter
Conditions
75mA =175
Results
0.05% 10mV 0.017% mVpp 87.7% mVpp
Step Converter
0.22 Osc. 2.2k Comp. 1.25V Reference Regulator 1500pF VOUT VOUT 1N5819
GM34063/ GM34063E
Optional Filter
GM34063/ GM34063E
External Current Boost Connections Peak Greater than 1.5A
VOUT
Comparator Oscillator
1.25V Reference Regulator
Figure External Switch
output switch driven into hard saturation (non-Darlington configuration) switch currents high driver currents mA), take come saturation. This condition will shorten time frequencies kHz, magnified high temperatures. This condition does occure with Darlington configuration, since output switch cannot saturate. non-Darlington configuration used, following output drive condition recommended.
Oscillator Comparator 1.25V Reference Regulator
VOUT
constant
Figure External Switch
GM34063/ GM34063E
GM34063/ GM34063E
Figure External Current Boost Connections Peak Greater than 1.5A
Test
Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency Output Ripple With Optional Fitter
Conditions
75mA =500 0.1W
Results
0.15% 3.5mV 0.03% mVpp 83.7% mVpp
Step Down Converter
GM34063/ GM34063E
0.33 3.6k 1.2k
Osc. Comp.
1N5819 470pF VOUT VOUT
1.25V Reference Regulator
Optional Filter
GM34063/ GM34063E
External Current Boost Connections Peak Greater than 1.5A
Oscillator Comparator 1.25V Reference Regulator VOUT
Figure External Switch
Comparator 1.25V Reference Regulator Oscillator VOUT
Figure External Switch
GM34063/ GM34063E
GM34063/ GM34063E
Figure External Current Boost Connections Peak Greater than 1.5A
Test
Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency Output Ripple With Optional Fitter
Conditions
10mA =100 0.1W
Results
0.012% 0.022mV 0.09% mVpp 910mA 62.2% mVpp
Voltage Inverting Converter
Osc. Comp. 1.25V Reference Regulator
88µH 1N5819 1500 1000±F VOUT VOUT
GM34063/ GM34063E
0.24 4.5V 6.0V
8.2k
Optional Filter
GM34063/ GM34063E
External Current Boost Connections Peak Greater than 1.5A
Comparator Oscillator
VOUT
1.25V Reference Regulator
Figure External Switch
Comparator 1.25V Reference Regulator Oscillator
VOUT
Figure External Switch
GM34063/ GM34063E
GM34063/ GM34063E
+12V
-12V
Comparator Oscillator
1.25V Reference Regulator
Figure Dual Output Voltage
VOUT Isolated form input -VOUT
GM34063/ GM34063E
Oscillator Comparator
1.25V Reference Regulator
Figure Higher Output Power, Higher Input Voltage
GM34063/ GM34063E
DESIGN FORMULAS
Calculation
toff
Step
Vout VIN(min) VIN(min) Vsat toff toff (ton toff) toff
Step Down
Vout VIN(min) Vsat Vout toff toff (ton toff) Iout(max)
Voltage Inverting
IVoutI Vsat toff toff (ton toff) Iout(max)( toff
(ton toff)
toff
Ipk(switch)
Iout(max)(
L(min)
0.3/ Ipk(swith)
0.3/ Ipk(swith)
0.3/ Ipk(swith)
(VIN(min) Vsat) Ipk(swtch) ton(max) Ioutton Vnpple(pp)
(VIN(min) -Vsat- Vout) Ipk(swtch)
ton(max)
(VIN(min) Vsat) Ipk(swtch) ton(max) Ioutton Vripple(pp)
Ipk(swith) (ton toff) 8Vripple(pp)
GM34063/ GM34063E
Vsat Saturation voltage output switch. Forward voltage drop output rectifier. Nominal input voltage. Vout Desired output voltage, Iout Desired output current. fmin- Minimum desired output switching frequency selected values Vripple(pp)- Desired peak-to peak output ripple voltage. practice, calculated capacitor value will need increased equivalent series resistance board layout. ripple voltage should kept value since will directly affect line load regulation.
GM34063/ GM34063E
SOP-8(SO-8) PACKAGE OUTLINE DIMENSIONS
0.008 +0.0018 -0.0005
0.028
+0.022 -0.013 +0.56 -0.33
(0.20
+0.05 -0.01
(0.71
Layout
0.060 1.52
0.236 0.008 (5.99
+0.21 -0.20
0.275 0.155
+0.003 -0.004
0.154
INDENT
(3.91 0.1)
0.024
0.050 1.270
Inches
0.191
+0.004 -0.002 +0.10 -0.05
(4.85
0.063 0.005 (1.60 0.13)
0.057 (1.45)
Inches
0.0025 0.0015 (0.175 0.075)
0.050 (1.270)
0.016
+0.004 -0.003 +0.10 -0.08
(0.41
DIP-8 PACKAGE OUTLINE DIMENSIONS
0.26 0.006
0.30
+0.015 -0.010
GM34063/ GM34063E
(6.60
+0.16 -0.15
(7.62 +0.38 -0.25
0.36 0.01 (9.14
+0.26 -0.25
0.015 0.380
0.13
+0.006 -0.002
0.01
+0.003 -0.002
(0.25 +0.08 -0.05
0.365 0.02 9.27 0.51
(3.30 +0.15 -0.05
0.180 4.570
0.125 3.180
0.018 0.004 0.46 0.10 0.039 0.07 0.99 0.18
0.06 0.01 (1.52 +0.26 -0.25
0.100 2.540
0.021 0.005 (0.53 +0.13 -0.12
Inches
GM34063/ GM34063E
ORDERING NUMBER
34063/ 34063E
Gamma Micro. Shipping Tube Tape Reel
Circuit Type
Package SO-8 DIP-8
GM34063/ GM34063E
Other recent searches
SPS28C - SPS28C SPS28C Datasheet
S10A40FR - S10A40FR S10A40FR Datasheet
PD-94340B - PD-94340B PD-94340B Datasheet
LM27222 - LM27222 LM27222 Datasheet
GA142 - GA142 GA142 Datasheet
D13001S - D13001S D13001S Datasheet
ADP1108 - ADP1108 ADP1108 Datasheet
2SC3355 - 2SC3355 2SC3355 Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
