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Details, datasheet, quote on part number:PT78ST151
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Datasheet text preview:
PT78ST100 Series
1.5 Amp Positive Step-Down Integrated Switching Regulator
SLTS059A
(Revised 6/30/2000)
· · · · · · ·
Very Small Footprint High Efficiency > 85% Self-Contained Inductor Internal Short-Circuit Protection Over-T mperature Protection e Fast Transient Response Wide Input Range
The PT78ST100 is a series of wideinput range, 3-terminal regulators.
These ISRs have a maximum output current of 1.5 Amps and an output voltage that is laser trimmed to a variety of industry standard voltages. These 78 series regulators have excellent line and load regulation with internal short- circuit and over-temperature protection, and are offered in a variety of standard output voltages. These ISRs are very flexible and may be used in a wide variety of applications.
Pin-Out Information
Pin
1
Ordering Information
Function
Vi n GND V out
PT78ST1 XX Y
Output Voltage 33 = 3.3 Volts 36 = 3.6 Volts 05 = 5.0 Volts 51 = 5.1 Volts 53 = 5.25 Volts 06 = 6.0 Volts 65 = 6.5 Volts 07 = 7.0 Volts 08 = 8.0 Volts 09 = 9.0 Volts 10 = 10.0 Volts 12 = 12.0 Volts 14 = 13.9 Volts 15 = 15.0 Volts
PT78ST100 SERIES
Standard Application
Vin
1
2 3
Package Suffix V = Vertical Mount S = Surface Mount H = Horizontal Mount
PT78ST100
2
3
Vout + COM
C1 COM
C2
C1 = Optional 1µF ceramic C2 = Required 100µF electrolytic
Specifications
Characteristics (Ta = 25°C unless noted) Output Current Short Circuit Current Input Voltage Range Symbols Io Isc Vin Vo Regline Regload Vn ttr
Pkg Style 500
Conditions Over Vin range
Vin = Vin min
Min 0.1* -- Vo= 3.3V Vo= 5V Vo= 12V 9 9 16 -- -- -- Vo= 5V Vo= 12V -- -- -- Vo= 3.3V Vo= 5V Vo= 12V -- -- -- 600 -40 -40 -- -40 -- -- --
Typ -- 3.5 -- -- -- ±1.0 ±0.2 ±0.1 65 90 100 5 80 85 90 650 -- -- 45 -- 500 5 6.5
Max 1.5 -- 26 38 38 ±2.0 ±0.4 ±0.2 -- -- -- -- -- -- 700 +85 +80** -- +125 -- -- --
Units A Apk V V V %Vo %Vo %Vo mVpp mVpp µSec %Vo % % % kHz °C °C °C/W °C G's G's grams
0.1 Io 1.5A Over Vin range, Io=1.5A
Ta = 0°C to +60°C
Output Voltage Tolerance Line Regulation Load Regulation Vo Ripple/Noise Transient Response (with 100µF output cap) Efficiency
Over Vin range 0.1 Io 1.5A Vin= 9V, Io= 1.5A Vin= 16V, Io= 1.5A 50% load change Vo over/undershoot Vin= 10V, Io= 1A Vin= 10V, Io= 1A Vin= 17V, Io= 1A Over Vin range, Io=1.5A -- Free Air Convection, (40-60LFM) At Vin= 24V, Io=1.0A Free Air Convection, (40-60LFM) -- Per Mil-STD-883D, Method 2002.3 Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, soldered in a PC board --
**See Thermal Derating chart.
Switching Frequency Absolute Maximum Operating T mperature Range e Recommended Operating Temperature Range Thermal Resistance Storage Temperature Mechanical Shock Mechanical Vibration Weight
o Ta Ta
ja
Ts -- -- --
*ISR will operate down to no load with reduced specifications.
Note: The PT78ST100 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT78ST100 Series
1.5 Amp Positive Step-Down Integrated Switching Regulator
Typical Characteristics
PT78ST133, 3.3 VDC
(See Note 1)
PT78ST105, 5.0 VDC
(See Note 1)
PT78ST112, 12.0 VDC
(See Note 1)
Efficiency vs Output Current
100 100
Efficiency vs Output Current
100
Efficiency vs Output Current
90
90
90
Efficiency - %
Efficiency - %
Vi n 80 9 .0V 12.0V 18.0V 24.0V 30.0V 38.0V
Efficiency - %
80
Vin 9 .0V 12.0V 15.0V
80
Vin 16.0V 18.0V
70
70
70
24.0V 30.0V 38.0V
60
20.0V 26.0V
60
60
50
50
50
40 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5
40 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5
40 0 0.25 0. 5 0.75 1 1.25 1. 5
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Ripple vs Output Current
100 150
Ripple vs Output Current
300
Ripple vs Output Current
80
120
250 Vin
Vin
26.0V
200
Vin 38.0V
Ripple-(mV)
20.0V 15.0V 12.0V
Ripple-(mV)
60
90
Ripple-(mV)
40
9 .0V
60
38.0V 30.0V 24.0V 18.0V 12.0V 9 .0V
150
30.0V 24.0V 18.0V 16.0V
100
20
30
50
0 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5
0 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5
0 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta)
1. 6 1. 4 1. 2
(See Note 2)
1. 6
Thermal Derating (Ta)
1. 4
(See Note 2)
1. 6
Thermal Derating (Ta)
1. 4 1. 2
(See Note 2)
60°C 60°C 70°C
70°C
1. 2
Iout-(Amps)
Iout-(Amps)
85°C
1 0. 8 0. 6 0. 4
Iout-(Amps)
70°C
1 0. 8 0. 6 0. 4 0. 2 0
60°C
1 0. 8 0. 6 0. 4 0. 2
85°C
85°C
0. 2
0
0 9 13 17 21 25
9
12
15
18
21
24
27
30
33
36
39
16
19
22
25
28
31
34
37
40
Vin-(Volts)
Vin-(Volts)
Vin-(Volts)
Power Dissipation vs Output Current
1. 8 1. 6 2. 5
Power Dissipation vs Output Current
3
Power Dissipation vs Output Current
2. 5 1. 4 Vin 2 Vin
PD-(Watts)
PD-(Watts)
1. 2 1 0. 8 0. 6 0. 4 0. 2
26.0V 20.0V 15.0V 12.0V 9 .0V
1. 5
1
38.0V 30.0V 24.0V 18.0V 12.0V 9 .0V
PD-(Watts)
2 Vin 38.0V 1 30.0V 24.0V 0. 5 18.0V 16.0V
1. 5
0. 5
0 0 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5 0 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5 0 0 .2 5 0. 5 0 .7 5 1 1 .2 5 1. 5
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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Copyright ©
2000, Te xas Instrume nts Incorporate d
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