TI PT6121N

(800) 531-5782
For assistance or to order, call
PT6120
Series
•
•
•
•
•
•
Low Voltage Input (7V)
89% Efficiency
Adjustable Output Voltage
Internal Short Circuit Protection
Over-Temperature Protection
On/Off Control (Ground Off)
The PT6120 series is a low voltage input (typically 7V) version of
Power Trends’ high-performance
1A, 12 pin SIP Integrated Switching
Pin-Out Information
Pin
Standard Application
VOADJ
12
VIN
2,3,4
PT6120
VOUT
9,10,11
1
5,6,7,8
C1
INH
C2
+
Q1
GND
GND
C1 = Optional 1µF ceramic
Q1 = NFET
C2 = Required 100µF electrolytic
Specifications
1
2
3
4
5
6
7
8
9
10
11
12
SLTS081
1 AMP ADJUSTABLE LOW VOLTAGE INPUT
INTEGRATED SWITCHING REGULATOR
Function
Inhibit
(30V max)
(Revised 6/4/98)
Regulators (ISRs). These ISRs are designed with premium low threshold FETs
for those applications requiring very low
input/output voltage differentials such as
battery powered equipment. This highperformance ISR family offers a unique
combination of features combining 89%
typical efficiency with open-collector on/
off control and adjustable output voltage.
Quiescent current in the shutdown mode
is less than 100µA.
Ordering Information
PT Series Suffix (PT1234X)
PT6121! = +5 Volts
PT6122! = +3.3 Volts
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
Vin
Vin
Vin
GND
GND
GND
GND
Vout
Vout
Vout
Vout Adj
N
A
C
Pkg Style 200
PT6120
PT6120 SERIES
Characteristics
(Ta =25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
0.1*
—
1.0
A
Short Circuit Current
Isc
Vin = Vin min
—
3.5
—
Apk
Input Voltage Range
Vin
0.1 ≤ Io ≤ 1.0 A
7
—
26
V
7
—
30/38**
V
∆Vo
Over Vin Range, Io = 1.0 A
Ta = 0°C to +60°C
—
±1.0
±2.0
%Vo
Line Regulation
Regline
Over Vin range
—
±0.25
±0.5
%Vo
Load Regulation
Regload
0.1 ≤ Io ≤ 1.0 A
—
±0.25
±0.5
%Vo
Vo Ripple/Noise
Vn
Vin=Vin min, Io=1.0 A
—
±2
—
%Vo
Transient Response
with Co = 100µF
ttr
Vos
50% load change
Vo over/undershoot
—
—
100
5.0
200
—
µSec
%Vo
Efficiency
η
Vin=9V, Io=0.5A, Vo=3.3V
Vin=9V, Io=0.5A, Vo=5V
—
—
84
89
—
—
%
%
Switching Frequency
ƒo
Over Vin and Io ranges
400
500
600
kHz
Shutdown Current
Isc
Vin = 15V
—
100
—
µA
Quiescent Current
Output Voltage
Adjustment Range
Inl
Vo
Io = 0A, Vin =10V
Below Vo
Above Vo
—
10
—
See Application Notes.
mA
Absolute Maximum
Operating Temperature Range
Ta
-40
—
+85
°C
Recommended Operating
Temperature Range
Ta
Free Air Convection, Vo= 3.3V
(40-60LFM)
Vo= 5V
-40
-40
—
—
+85***
+85***
°C
Thermal Resistance
θja
Free Air Convection
(40-60LFM)
—
—
50
40
—
—
°C/W
Storage Temperature
Ts
-40
—
+125
°C
(Note: inhibit function cannot be used with Vin above 30V)
Output Voltage Tolerance
Vo = 3.3V
Vo = 5V
Vo = 3.3V
Vo = 5V
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2
20-2000 Hz, Soldered in a PC board
Weight
—
500
—
10
—
5.0
—
—
—
G’s
G’s
grams
* ISR will operate down to no load with reduced specifications.
** Input voltage cannot exceed 30V when the inhibit function is used.
***See Thermal Derating chart.
Note: The PT6120 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
4
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782
Fax: (630) 393-6902 http://www.ti.com/powertrends
(800) 531-5782
For assistance or to order, call
PT6120
CHARACTERISTIC
DATA
PT6122, 3.3 VDC
PT6121, 5.0 VDC
(See Note 1)
(See Note 1)
Efficiency vs Output Current
Efficiency vs Output Current
100
100
90
Efficiency - %
Efficiency - %
90
Vin
80
9.0V
12.0V
70
15.0V
18.0V
26.0V
60
Vin
80
9.0V
12.0V
18.0V
24.0V
30.0V
38.0V
70
60
50
50
40
40
0
0.2
0.4
0.6
0.8
0
1
0.2
0.4
0.6
Iout-(Amps)
0.8
1
Iout-(Amps)
Ripple vs Output Current
Ripple vs Output Current
90
180
80
160
70
140
Vin
60
26.0V
18.0V
50
15.0V
12.0V
40
Ripple-(mV)
Ripple-(mV)
Series
Vin
120
38.0V
30.0V
100
24.0V
18.0V
80
12.0V
9.0V
30
60
20
40
10
20
9.0V
0
0
0
0.2
0.4
0.6
0.8
0
1
0.2
0.4
Iout-(Amps)
Thermal Derating (Ta)
0.6
0.8
1
Iout-(Amps)
Thermal Derating (Ta)
(See Note 2)
1
(See Note 2)
1
70°C
0.8
Iout-(Amps)
0.8
Iout-(Amps)
70°C
85°C
0.6
0.4
0.2
85°C
0.6
0.4
0.2
0
0
9
12
15
18
21
24
27
Vin-(Volts)
9
12
15
18
21
24
27
30
33
36
39
Vin-(Volts)
(n
Power Dissipation vs Output Current
Power Dissipation vs Output Current
1.4
1
0.9
1.2
0.8
PD-(Watts)
26.0V
0.6
18.0V
0.5
15.0V
12.0V
0.4
9.0V
0.3
PD-(Watts)
Vin
0.7
Vin
1
38.0V
30.0V
24.0V
18.0V
12.0V
9.0V
0.8
0.6
0.4
0.2
0.2
0.1
0
0
0.2
0.4
0.6
0.8
1
0
Iout-(Amps)
0
0.2
0.4
0.6
0.8
1
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.)
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782
Fax: (630) 393-6902 http://www.ti.com/powertrends
5
(800) 531-5782
For assistance or to order, call
Application
Notes
PT6100/6120/6210/6220/6300/6320 Series
More Application Notes
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).
Figure 1
2,3,4
Vin
PT6100/6200/6300
Vin
Vo
GND
9,10,11
Vo
Vo(adj)
5,6,7,8
12
(R1)
Adj Down
C1
1µF Ceramic
(Optional)
C2
100 µF
(Req'd)
+
R2
Adjust Up
COM
COM
Adjust Down: Add a resistor (R1), between pin 12 (Vo adjust)
and pins 9-11(Vout).
Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor; either (R1) or R2 as appropriate.
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
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.
4. 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. Note
that the minimum input voltage limits are also model dependant.
Vin (max) = (8 x Va)V or *30/38V,
whichever is less.
(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
*Limit is 30V when inhibit function is active.
2Adc Rated
PT6x0x/PT6x1x series:
Vin (min) = (Va + 4)V or 9V,
whichever is greater.
PT6x2x series:
Vo <10V;
Vin (min) = (Va + 2.0)V or 7.0V,
whichever is greater.
Vo ≥10V;
Vin (min) = (Va + 2.5)V
3Adc Rated
PT6102
PT6122
PT6213
PT6223
PT6303
PT6323
PT6101
PT6121
PT6103
PT6212
PT6222
PT6302
PT6322
PT6214
PT6304
Vo (nom)
Va (min)
3.3
5.0
5.0
12.0
1.89
1.88
2.18
2.43
Va (max)
Ω)
Ro (kΩ
6.07
11.25
8.5
22.12
66.5
150.0
90.9
243.0
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
3
For assistance or to order, call
(800) 531-5782
Application
PT6100/6120/6210/6220/6300/6320 Series
Notes
Table 2
ISR ADJUSTMENT RESISTOR VALUES
1Adc Rated
2Adc Rated
3Adc Rated
Vo (nom)
Va (req.d)
PT6102
PT6122
PT6213
PT6223
PT6303
PT6323
PT6101
PT6121
3.3
5.0
1Adc Rated
PT6212
PT6222
PT6302
PT6322
5.0
PT6101
PT6121
PT6214
PT6212
PT6222
PT6302
PT6322
2Adc Rated
PT6304
3Adc Rated
12.0
PT6103
Vo (nom)
Va (req.d)
5.0
5.0
PT6214
PT6304
12.0
1.9
(30.9)kΩ
(31.5)kΩ
6.2
156.0kΩ
94.7kΩ
(207.0)kΩ
2.0
(38.4)kΩ
(37.5)kΩ
6.4
134.0kΩ
81.2kΩ
(223.0)kΩ
2.1
(47.1)kΩ
(44.0)kΩ
6.6
117.0kΩ
71.0kΩ
(241.0)kΩ
2.2
(57.4)kΩ
(50.9)kΩ
(30.8)kΩ
6.8
104.0kΩ
63.1kΩ
(259.0)kΩ
2.3
(69.8)kΩ
(58.3)kΩ
(35.4)kΩ
7.0
93.8kΩ
56.8kΩ
(279.0)kΩ
2.4
(85.0)kΩ
(66.3)kΩ
(40.2)kΩ
7.2
85.2kΩ
51.6kΩ
(301.0)kΩ
2.5
(104.0)kΩ
(75.0)kΩ
(45.5)kΩ
(32.0)kΩ
7.4
78.1kΩ
47.3kΩ
(325.0)kΩ
2.6
(128.0)kΩ
(84.4)kΩ
(51.1)kΩ
(34.9)kΩ
7.6
72.1kΩ
43.7kΩ
(351.0)kΩ
2.7
(161.0)kΩ
(94.6)kΩ
(57.3)kΩ
(37.9)kΩ
7.8
67.0kΩ
40.6kΩ
(379.0)kΩ
2.8
(206.0)kΩ
(106.0)kΩ
(64.0)kΩ
(40.9)kΩ
8.0
62.5kΩ
37.9kΩ
(410.0)kΩ
2.9
(274.0kΩ
(118.0)kΩ
(71.4)kΩ
(44.1)kΩ
8.2
58.6kΩ
35.5kΩ
(444.0)kΩ
3.0
(388.0)kΩ
(131.0)kΩ
(79.5)kΩ
(47.3)kΩ
8.4
55.1kΩ
33.4kΩ
(483.0)kΩ
3.1
(615.0)kΩ
(146.0)kΩ
(88.5)kΩ
(50.5)kΩ
8.6
52.1kΩ
(525.0)kΩ
3.2
(1300.0)kΩ
(163.0)kΩ
(98.5)kΩ
(53.8)kΩ
8.8
49.3kΩ
(573.0)kΩ
(181.0)kΩ
(110.0)kΩ
(57.3)kΩ
9.0
46.9kΩ
(628.0)kΩ
3.3
3.4
831.0kΩ
(202.0)kΩ
(122.0)kΩ
(60.8)kΩ
9.5
41.7kΩ
(802.0)kΩ
3.5
416.0kΩ
(225.0)kΩ
(136.0)kΩ
(64.3)kΩ
10.0
37.5kΩ
(1060.0)kΩ
3.6
227.0kΩ
(252.0)kΩ
(153.0)kΩ
(68.0)kΩ
10.5
34.1kΩ
(1500.0)kΩ
3.7
208.0kΩ
(283.0)kΩ
(171.0)kΩ
(71.7)kΩ
11.0
31.3kΩ
3.8
166.0kΩ
(319.0)kΩ
(193.0)kΩ
(75.6)kΩ
11.5
3.9
139.0kΩ
(361.0)kΩ
(219.0)kΩ
(79.5)kΩ
12.0
4.0
119.0kΩ
(413.0)kΩ
(250.0)kΩ
(83.5)kΩ
12.5
608.0kΩ
4.1
104.0kΩ
(475.0)kΩ
(288.0)kΩ
(87.7)kΩ
13.0
304.0kΩ
4.2
92.4kΩ
(533.0)kΩ
(335.0)kΩ
(91.9)kΩ
13.5
203.0kΩ
4.3
83.1kΩ
(654.0)kΩ
(396.0)kΩ
(96.3)kΩ
14.0
152.0kΩ
4.4
75.6kΩ
(788.0)kΩ
(477.0)kΩ
(101.0)kΩ
14.5
122.0kΩ
4.5
69.3kΩ
(975.0)kΩ
(591.0)kΩ
(105.0)kΩ
15.0
101.0kΩ
4.6
63.9kΩ
(1260.0)kΩ
(761.0)kΩ
(110.0)kΩ
15.5
86.8kΩ
4.7
59.4kΩ
(1730.0)kΩ
(1050.0)kΩ
(115.0)kΩ
16.0
75.9kΩ
4.8
55.4kΩ
(1610.0)kΩ
(120.0)kΩ
16.5
67.5kΩ
4.9
52.0kΩ
(125.0)kΩ
17.0
60.8kΩ
5.0
48.9kΩ
(130.0)kΩ
17.5
55.2kΩ
5.1
46.2kΩ
1880.0kΩ
1140.0kΩ
(136.0)kΩ
18.0
50.6kΩ
5.2
43.8kΩ
937.0kΩ
568.0kΩ
(141.0)kΩ
18.5
46.7kΩ
5.3
41.6kΩ
625.0kΩ
379.0kΩ
(147.0)kΩ
19.0
43.4kΩ
5.4
39.6kΩ
469.0kΩ
284.0kΩ
(153.0)kΩ
19.5
40.5kΩ
5.5
37.8kΩ
375.0kΩ
227.0kΩ
(159.0)kΩ
20.0
38.0kΩ
5.6
36.1kΩ
313.0kΩ
189.0kΩ
(165.0)kΩ
20.5
35.7kΩ
5.7
34.6kΩ
268.0kΩ
162.0kΩ
(172.0)kΩ
21.5
33.8kΩ
5.8
33.3kΩ
234.0kΩ
142.0kΩ
(178.0)kΩ
21.5
32.0kΩ
5.9
32.0kΩ
208.0kΩ
126.0kΩ
(185.0)kΩ
22.0
30.4kΩ
30.8kΩ
R2 = Black
188.0kΩ
114.0kΩ
(192.0)kΩ
6.0
R1 = (Red)
4
ISR ADJUSTMENT RESISTOR VALUES (Cont)
PT6103
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
(800) 531-5782
For assistance or to order, call
Application
Notes
PT6100/6120/6210/6220/6300/6320 Series
More Application Notes
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 Inhibit control, pin 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 low-level2 ground signal is applied
to pin 1 the regulator output is disabled, and the input current to
the ISR is reduced to about 100µA 3/.
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 opencollector or open-drain output can be used to control this pin. A
discrete bipolar transistor or MOSFET is recommended.
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. The following equation may be used to determine the approximate current drawn from the input supply at Vin, and
through Q1 when the inhibit is active.
Istby
= Vin ÷ 155kΩ ± 20%
4. When the inhibit control pin is active, i.e. pulled low, the
maximum input voltage is limited to +30Vdc.
Figure 1
2,3,4
V in
PT6100/6210/6300
Vin
Vo
GND
Inh
V out
12
C2
100 µF
Q1
2N7002
Inh
9,10,11
Vo(adj)
5,6,7,8
1
C1, 1 µF
(Optional)
+
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.
Figure 2
6
5
4
Vo (Vdc)
Using the Inhibit Function on Power Trends’
Wide Input Range Bus ISRs
3
2
1
0
5. 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.
-0.2
0
0.2
0.4
0.6
0.8
1
t (milli-secs)
6. 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.
7. Keep the On/Off transition to less than 10µs. This prevents
erratic operation of the ISR, which can cause a momentary
high output voltage.
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
5
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
Customers are responsible for their applications using TI components.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright  2000, Texas Instruments Incorporated