TI PT6303A

PT6300 Series
3 Amp Adjustable Positive Step-down
Integrated Sw itching Regulators
SLTS031B
(Revised 9/30/2000)
•
•
•
•
•
•
•
90% Efficiency
Adjustable Output Voltage
Internal Short Circuit Protection
Over-Temperature Protection
On/Off Control (Ground Off)
Small SIP Footprint
Wide Input Range
The PT6300 Series is a line of
High-Performance 3 Amp, 12-Pin SIP
(Single In-line Package) Integrated
Pin-Out Information
Pin
1
Standard Application
VOADJ
12
VIN
2,3,4
PT6300
VOUT
9,10,11
1
5,6,7,8
C1
C2
INH
+
Q1
COM
COM
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
Q1 = NFET
(1)
Specifications
Function
Inhibit
(30V max)
2
3
Vin
Vin
4
5
Vin
GND
6
7
GND
GND
8
9
GND
Vout
10
11
Vout
Vout
12
Vout Adj (5)
Switching Regulators (ISRs) designed
to meet the on-board power conversion
needs of battery powered or other
equipment requiring high efficiency and
small size. This high performance ISR
family offers a unique combination of
features combining 90% typical efficiency with open-collector on/off
control and adjustable output voltage.
Quiescent current in the shutdown
mode is typically less than 100µA.
Ordering Information
PT6302¨
PT6303¨
PT6304¨
PT6314¨
PT Series Suffix (PT1234X)
= +5 Volts
= +3.3 Volts
= +12 Volts
= +1.5Volts
Case/Pin
Configuration
N
A
C
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
Pkg Style 200
PT6300 SERIES
Characteristics
(Ta=25°C unless noted)
Symbols
Output Current
Short Circuit Current
Conditions
Min
Io
Isc
Over Vin range
Vin = Vo + 5V
0.1
—
Typ
Max
Units
—
5.0
3.0
—
A
Apk
Input Voltage Range
(Note: inhibit function cannot
be used above 30V.)
Vin
0.1 ≤ Io ≤ 3.0 A
16
9
9
9.0
—
—
—
—
30/38 (3)
30/38 (3)
26
17
V
Output Voltage Tolerance
∆Vo
Over Vin Range, Io = 3.0 A
Ta = 0°C to +60°C
—
±1.0
±2.0
%Vo
Line Regulation
Load Regulation
Regline
Regload
Over Vin range
0.1 ≤ Io ≤ 3.0 A
—
—
±0.25
±0.25
±0.5
±0.5
%Vo
%Vo
Vo Ripple/Noise
Transient Response
with Co = 100µF
Efficiency
Vn
ttr
Vos
η
—
—
—
—
—
—
—
600
400
350
±2
100
5.0
91
89
84
72
750
500
450
—
200
—
—
—
—
—
900
600
550
%Vo
µSec
%Vo
Vo = 12V
Vo = 5.0V
Vo = 3.3V
Vo = 1.5V
(2)
Switching Frequency
ƒo
Vin = Vin min, Io = 3.0 A
50% load change
Vo over/undershoot
Vin=16V, Io = 0.5 A,
Vin=9V, Io = 0.5 A,
Vin=9V, Io = 0.5 A,
Vin=9V, Io =0.5A,
Over Vin and Io ranges,
Shutdown Current
Quiescent Current
Isc
Inl
Vin = 15V
Io = 0A, Vin =10V
—
—
100
10
—
—
µA
mA
Absolute Maximum
Operating Temperature Range
Ta
Over Vin range
-40
—
+85 (4)
°C
Thermal Resistance
θja
Free Air Convection (40-60LFM)
—
30
—
°C/W
Storage Temperature
Ts
—
-40
—
+125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3, 1 msec,
Half Sine, mounted to a fixture
—
500
—
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz,Soldered in a PC board
—
—
10
—
G’s
—
6.5
—
grams
Weight
Notes: (1)
(2)
(3)
(4)
(5)
—
Vo = 12V
Vo = 5.0V
Vo = 3.3V
Vo = 1.5V
Vo = 12V
Vo = 3.3V/5V
Vo = 1.5V
The PT6300 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
The ISR will operate to no load with reduced specifications.
Input voltage cannot exceed 30V when the inhibit function is used.
See Thermal Derating charts.
Consult the related application note for guidance on adjusting the output voltage.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
%
kHz
Typical Characteristics
PT6300 Series
3 Amp Adjustable Positive Step-down
Integrated Sw itching Regulators
PT6303, 3.3 VDC
PT6302, 5.0 VDC
(See Note A)
Efficiency vs Output Current
Efficiency vs Output Current
100
Efficiency vs Output Current
90
70
60
Vin
80
9.0V
12.0V
15.0V
24.0V
30.0V
38.0V
70
60
Efficiency - %
9.0V
12.0V
15.0V
20.0V
26.0V
Efficiency - %
90
Vin
80
(See Note A)
100
100
90
Efficiency - %
PT6304, 12.0 VDC
(See Note A)
Vin
80
16.0V
20.0V
70
24.0V
30.0V
38.0V
60
50
50
50
40
0
0.5
1
1.5
2
2.5
3
40
40
0
0.5
1
Iout-(Amps)
2
2.5
0
3
160
26.0V
20.0V
15.0V
12.0V
9.0V
80
60
Ripple-(mV)
Vin
100
80
250
60
20
20
1.5
2
2.5
38.0V
30.0V
24.0V
20.0V
150
16.0V
100
0
0
1
Vin
200
50
0
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
3
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta)
3
300
38.0V
30.0V
24.0V
15.0V
12.0V
9.0V
100
40
2.5
Vin
120
40
2
350
140
V
120
1.5
Ripple vs Output Current
Ripple-(mV)
180
140
0.5
1
Iout-(Amps)
Ripple vs Output Current
160
0
0.5
Iout-(Amps)
Ripple vs Output Current
Ripple-(mV)
1.5
Thermal Derating (Ta)
(See Note B)
60°C
3
Iout-(Amps)
Thermal Derating (Ta)
(See Note B)
3
(See Note B)
3
50°C
70°C
40°C
60°C
2.5
2.5
2.5
50°C
70°C
85°C
1.5
1
2
Iout-(Amps)
2
2
Iout-(Amps)
Iout-(Amps)
60°C
85°C
1.5
1
70°C
1.5
1
0.5
0.5
0.5
0
0
0
9
9
11
13
15
17
19
21
23
25
13
17
21
Vin-(Volts)
29
33
16
37
19
22
25
Vin-(Volts)
Power Dissipation vs Output Current
3
1
37
4
3.5
38.0V
30.0V
24.0V
15.0V
12.0V
9.0V
2
1.5
PD-(Watts)
Vin
2.5
PD-(Watts)
26.0V
20.0V
15.0V
12.0V
9.0V
1.5
34
4.5
3
Vin
2
31
Power Dissipation vs Output Current
3.5
2.5
28
Vin-(Volts)
Power Dissipation vs Output Current
3.5
PD-(Watts)
25
27
Vin
3
38.0V
30.0V
24.0V
20.0V
16.0V
2.5
2
1.5
1
1
0.5
0.5
0.5
0
0
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
0
0
Iout-(Amps)
Iout-(Amps)
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Note A: Characteristic data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR
Note B: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application note.)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6100/6210/6300 Series
Adjusting the Output Voltage of Power Trends’
Wide Input Range Bus ISRs
The output voltage of the Power Trends’ Wide Input
Range Series ISRs may be adjusted higher or lower than
the factory trimmed pre-set voltage with the addition of a
single external resistor. Table 1 accordingly gives the
allowable adjustment range for each model for either
series as Va (min) and Va (max).
Adjust Up:
An increase in the output voltage is obtained by
adding a resistor R2, between pin 12 (Vo adjust) and pins 5-8
(GND).
Adjust Down: Add a resistor (R1), between pin 12 (Vo adjust)
and pins 9-11(Vout).
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from Vo adjust to either GND
or Vout. Any capacitance added to the Vo adjust pin will
affect the stability of the ISR.
3. Adjustments to the output voltage may place additional
limits on the maximum and minimum input voltage for
the part. The revised maximum and minimum input
voltage limits must comply with the following
requirements. The limits are model dependant.
PT6216/PT6314:
Vin (max) = (10 x Va)V or 17V, whichever is less.
Vin (min) = 9.0V
Figure 1
All other models:
2,3,4
Vin
PT6100/6200/6300
Vin
Vo
GND
9,10,11
Vo
Vin (min) = (Va + 4)V or 9V, whichever is greater.
Vo(adj)
5,6,7,8
12
(R1)
Adj Down
C1
1µF Ceramic
(Optional)
Vin (max) = (8 x Va)V or as specified.
C2
100µF
(Req'd)
+
R2
Adjust
Up
COM
COM
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas. Refer to
Figure 1 and Table 2 for both the placement and value of the
required resistor; either (R1) or R2 as appropriate.
(R1)
=
Ro (Va – 1.25)
Vo – Va
kΩ
R2
=
1.25 Ro
Va – Vo
kΩ
Where: Vo = Original output voltage
Va = Adjusted output voltage
Ro = The resistance value fromTable 1
Table 1
ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS
1Adc Rated
2Adc Rated
3Adc Rated
PT6216
PT6314
PT6102
PT6213
PT6303
PT6101
PT6212
PT6302
PT6103
PT6214
PT6304
12.0
Vo (nom)
Va (min)
1.5
3.3
5.0
5.0
1.3
1.8
1.88
2.18
2.43
Va (max)
Ω)
Ro (kΩ
1.9
6.07
11.25
8.5
22.12
8.25
66.5
150.0
90.9
243.0
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
PT6100/6210/6300 Series
Table 2
ISR ADJUSTMENT RESISTOR VALUES
1Adc Rated
2Adc Rated
3Adc Rated
Vo (nom)
Va (req.d)
PT6216
PT6314
1.5
PT6102
PT6213
PT6303
3.3
ISR ADJUSTMENT RESISTOR VALUES (Cont)
PT6101
5.0
PT6212
PT6302
5.0
PT6103
PT6214
PT6304
12.0
1Adc Rated
2Adc Rated
3Adc Rated
Vo (nom)
Va (req.d)
PT6101
5.0
PT6212
PT6302
5.0
PT6103
PT6214
PT6304
12.0
1.3
(2.1kΩ)
6.2
156.0kΩ
94.7kΩ
(207.0)kΩ
1.4
(12.4kΩ)
6.4
134.0kΩ
81.2kΩ
(223.0)kΩ
6.6
117.0kΩ
71.0kΩ
(241.0)kΩ
1.5
1.6
103.0kΩ
6.8
104.0kΩ
63.1kΩ
(259.0)kΩ
1.7
51.6kΩ
7.0
93.8kΩ
56.8kΩ
(279.0)kΩ
1.8
34.4kΩ
(24.4)kΩ
7.2
85.2kΩ
51.6kΩ
(301.0)kΩ
1.9
25.8kΩ
(30.9)kΩ
(31.5)kΩ
7.4
78.1kΩ
47.3kΩ
(325.0)kΩ
2.0
(38.4)kΩ
(37.5)kΩ
7.6
72.1kΩ
43.7kΩ
(351.0)kΩ
2.1
(47.1)kΩ
(44.0)kΩ
7.8
67.0kΩ
40.6kΩ
(379.0)kΩ
2.2
(57.4)kΩ
(50.9)kΩ
(30.8)kΩ
8.0
62.5kΩ
37.9kΩ
(410.0)kΩ
2.3
(69.8)kΩ
(58.3)kΩ
(35.4)kΩ
8.2
58.6kΩ
35.5kΩ
(444.0)kΩ
2.4
(85.0)kΩ
(66.3)kΩ
(40.2)kΩ
8.4
55.1kΩ
33.4kΩ
(483.0)kΩ
2.5
(104.0)kΩ
(75.0)kΩ
(45.5)kΩ
(32.0)kΩ
8.6
52.1kΩ
(525.0)kΩ
2.6
(128.0)kΩ
(84.4)kΩ
(51.1)kΩ
(34.9)kΩ
8.8
49.3kΩ
(573.0)kΩ
2.7
(161.0)kΩ
(94.6)kΩ
(57.3)kΩ
(37.9)kΩ
9.0
46.9kΩ
(628.0)kΩ
2.8
(206.0)kΩ
(106.0)kΩ
(64.0)kΩ
(40.9)kΩ
9.5
41.7kΩ
(802.0)kΩ
2.9
(274.0kΩ
(118.0)kΩ
(71.4)kΩ
(44.1)kΩ
10.0
37.5kΩ
(1060.0)kΩ
3.0
(388.0)kΩ
(131.0)kΩ
(79.5)kΩ
(47.3)kΩ
10.5
34.1kΩ
(1500.0)kΩ
3.1
(615.0)kΩ
(146.0)kΩ
(88.5)kΩ
(50.5)kΩ
11.0
31.3kΩ
3.2
(1300.0)kΩ
(163.0)kΩ
(98.5)kΩ
(53.8)kΩ
11.5
3.3
(181.0)kΩ
(110.0)kΩ
(57.3)kΩ
3.4
831.0kΩ
(202.0)kΩ
(122.0)kΩ
(60.8)kΩ
12.5
608.0kΩ
3.5
416.0kΩ
(225.0)kΩ
(136.0)kΩ
(64.3)kΩ
13.0
304.0kΩ
3.6
227.0kΩ
(252.0)kΩ
(153.0)kΩ
(68.0)kΩ
13.5
203.0kΩ
3.7
208.0kΩ
(283.0)kΩ
(171.0)kΩ
(71.7)kΩ
14.0
152.0kΩ
3.8
166.0kΩ
(319.0)kΩ
(193.0)kΩ
(75.6)kΩ
14.5
122.0kΩ
3.9
139.0kΩ
(361.0)kΩ
(219.0)kΩ
(79.5)kΩ
15.0
101.0kΩ
4.0
119.0kΩ
(413.0)kΩ
(250.0)kΩ
(83.5)kΩ
15.5
86.8kΩ
4.1
104.0kΩ
(475.0)kΩ
(288.0)kΩ
(87.7)kΩ
16.0
75.9kΩ
4.2
92.4kΩ
(533.0)kΩ
(335.0)kΩ
(91.9)kΩ
16.5
67.5kΩ
4.3
83.1kΩ
(654.0)kΩ
(396.0)kΩ
(96.3)kΩ
17.0
60.8kΩ
4.4
75.6kΩ
(788.0)kΩ
(477.0)kΩ
(101.0)kΩ
17.5
55.2kΩ
4.5
69.3kΩ
(975.0)kΩ
(591.0)kΩ
(105.0)kΩ
18.0
50.6kΩ
4.6
63.9kΩ
(1260.0)kΩ
(761.0)kΩ
(110.0)kΩ
18.5
46.7kΩ
4.7
59.4kΩ
(1730.0)kΩ
(1050.0)kΩ
(115.0)kΩ
19.0
43.4kΩ
4.8
55.4kΩ
(1610.0)kΩ
(120.0)kΩ
19.5
40.5kΩ
4.9
52.0kΩ
(125.0)kΩ
20.0
38.0kΩ
5.0
48.9kΩ
(130.0)kΩ
20.5
35.7kΩ
5.1
46.2kΩ
1880.0kΩ
1140.0kΩ
(136.0)kΩ
21.5
33.8kΩ
5.2
43.8kΩ
937.0kΩ
568.0kΩ
(141.0)kΩ
21.5
32.0kΩ
5.3
41.6kΩ
625.0kΩ
379.0kΩ
(147.0)kΩ
22.0
30.4kΩ
5.4
39.6kΩ
469.0kΩ
284.0kΩ
(153.0)kΩ
5.5
37.8kΩ
375.0kΩ
227.0kΩ
(159.0)kΩ
5.6
36.1kΩ
313.0kΩ
189.0kΩ
(165.0)kΩ
5.7
34.6kΩ
268.0kΩ
162.0kΩ
(172.0)kΩ
5.8
33.3kΩ
234.0kΩ
142.0kΩ
(178.0)kΩ
5.9
32.0kΩ
208.0kΩ
126.0kΩ
(185.0)kΩ
6.0
30.8kΩ
188.0kΩ
114.0kΩ
(192.0)kΩ
R1 = (Blue)
12.0
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6100/6210/6300 Series
Using the Inhibit Function on Power Trends’
Wide Input Range Bus ISRs
For applications requiring output voltage On/Off control,
the 12pin ISR products incorporate an inhibit function.
The function has uses in areas such as battery conservation,
power-up sequencing, or any other application where the
regulated output from the module is required to be
switched off. The On/Off function is provided by the
Pin 1 (Inhibit) control.
Figure 1
The ISR functions normally with Pin 1 open-circuit,
providing a regulated output whenever a valid source
voltage is applied to Vin, (pins 2, 3, & 4). When a lowlevel2 ground signal is applied to Pin 1, the regulator
output will be disabled.
Inh
Figure 1 shows an application schematic, which details
the typical use of the Inhibit function. Note the discrete
transistor (Q1). The Inhibit control has its own internal
pull-up with a maximum open-circuit voltage of 8.3VDC.
Only devices with a true open-collector or open-drain
output can be used to control this pin. A discrete bipolar
transistor or MOSFET is recommended.
Equation 1 may be used to determine the approximate
current drawn by Q1 when the inhibit is active.
Equation 1
= Vin ÷ 155kΩ
PT6100/6210/6300
Vin
Vo
Inh*
1
C1, 1µF
(Optional)
GND
9,10,11
V out
Vo(adj)
5,6,7,8
12
C2
100µF
Q1
BSS138
+
COM
COM
Turn-On Time: The output of the ISR is enabled automatically
when external power is applied to the input. The Inhibit control
pin is pulled high by its internal pull-up resistor. The ISR
produces a fully regulated output voltage within 1-msec of
either the release of the Inhibit control pin, or the application
of power. The actual turn-on time will vary with the input
voltage, output load, and the total amount of capacitance connected to the output Using the circuit of Figure 1, Figure 2
shows the typical rise in output voltage for the PT6101
following the turn-off of Q1 at time t =0. The waveform was
measured with a 9Vdc input voltage, and 5-Ohm resistive load.
± 20%
Notes:
1. The Inhibit control logic is similar for all Power Trends’
modules, but the flexibility and threshold tolerances will be
different. For specific information on the inhibit function
of other ISR models, consult the applicable application
note.
2. Use only a true open-collector device (preferably a discrete
transistor) for the Inhibit input. Do Not use a pull-up
resistor, or drive the input directly from the output of a
TTL or other logic gate. To disable the output voltage,
the control pin should be pulled low to less than +1.5VDC.
3. When the Inhibit control pin is active, i.e. pulled low, the
maximum allowed input voltage is limited to +30Vdc.
Figure 2
6
5
4
Vo (Vdc)
Istby
2,3,4
V in
3
2
1
0
-0.2
4. Do not control the Inhibit input with an external DC
voltage. This will lead to erratic operation of the ISR and
may over-stress the regulator.
5. Avoid capacitance greater than 500pF at the Inhibit control
pin. Excessive capacitance at this pin will cause the ISR to
produce a pulse on the output voltage bus at turn-on.
6. Keep the On/Off transition to less than 10µs. This
prevents erratic operation of the ISR, which can cause a
momentary high output voltage.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
0
0.2
0.4
t (milli-secs)
0.6
0.8
1
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