TEXAS INSTRUMENTS SLTS029A Technical data

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PT6100 Series

1 Amp Adjustable Positive Step-down Integrated Switching Regulator

SLTS029A

(Revised 6/30/2000)

The PT6100 Series is a line of High-Perfor-

• 90% Efficiency

• Adjustable Output Voltage

• Internal Short Circuit Protection

• Over-Temperature Protection

• On/Off Control (Ground Off)

• Small SIP Footprint

• Meets Requirements for FCC

Part 15; Class B limits for Radiated Emissions

• Wide Input Range

Pin-Out Information

Pin Function

Inhibit

Standard Application

VOADJ

INH

COM COM

2,3,4

PT6100

5,6,7,8

C1 = Optional 1µF ceramic

= NFET

= Required 100µF electrolytic

9,10,11

OUT

Specifications

Characteristics (T

=25°C unless noted) Symbols Conditions Min Typ Max Units

Output Current I

Short Circuit Current I

Input Voltage Range V

(Note: inhibit function cannot Vo = 5V 9 — 30/38** V be used with Vin above 30V.) Vo = 12V 16 — 30/38** V

Output Voltage Tolerance ∆V

Line Regulation Reg

Load Regulation Reg

Ripple/Noise V

Transient Response t with Co = 100µF V

Efficiency η V

Switching Frequency ƒ

Shutdown Current I Quiescent Current I Output Voltage V

Adjustment Range Above V

Absolute Maximum T Operating Temperature Range

Recommended Operating T Temperature Range (40-60LFM) V

Thermal Resistance

Storage Temperature T

Mechanical Shock Per Mil-STD-883D, Method 2002.3

Mechanical Vibration Per Mil-STD-883D, Method 2007.2

Weight — 5.0 — 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 PT6100 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

line

load

(30V max)

5 GND 6 GND 7 GND 8 GND 9V

out

10 V

out

11 V

out

12 V

out

Adj

Over Vin range 0.1* — 1.0 A

min — 3.5 — Apk

Vin = V

0.1 ≤ Io ≤ 1.0 A V

Over Vin Range, Io = 1.0 A T

= 0°C to +60°C

Over Vin range — ±0.25 ±0.5 %V

0.1 ≤ Io ≤ 1.0 A — ±0.25 ±0.5 %V

Vin=V

min, I

50% load change — 100 200 µSec Vo over/undershoot — 5.0 — %V

=9V, Io=0.5A, Vo=3.3V — 84 — %

=9V, Io=0.5A, Vo=5V — 89 — %

Vin=16V, Io=0.5A, Vo=12V — 91 — %

Over Vin and Io ranges 400 500 600 kHz

Vin = 15V — 100 — µA Io = 0A, V Below V

=10V — 10 — mA

Free Air Convection, Vo= 3.3V -40 — +85***

Vin=24V, Io=0.75A Vo= 12V -40 — +80***

Free Air Convection V (40-60LFM) V

1 msec, Half Sine, mounted to a fixture

20-2000 Hz, Soldered in a PC board

Ordering Information

PT6101 = +5 Volts PT6102 = +3.3 Volts PT6103 = +12 Volts

Pkg Style 200

= 3.3V 9 — 26 V

=1.0 A — ±2 — %V

= 5V -40 — +85*** °C

= 3.3V — 50 —

= 5V — 40 — °C/W

= 12V — 40 —

mance 1 Amp, 12-Pin SIP (Single In-line Package) Integrated 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 less than 100µA.

PT Series Suffix

Case/Pin Configuration

Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount

PT6100 SERIES

— ±1.0 ±2.0 %V

See Application Notes.

-40 — +85 °C

-40 — +125 °C

— 500

—10

(PT1234X)

—

N A C

G’s

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

PT6100 Series

Typical Characteristics

1 Amp Adjustable Positive Step-down Integrated Switching Regulator

PT6102, 3.3 VDC (See Note 1) PT6101, 5.0 VDC (See Note 1) PT6103, 12.0 VDC (See Note 1)

Efficiency vs Output Current Efficiency vs Output Current

100

Efficiency - %Ripple-(mV)Iout-(Amps)PD-(Watts)

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Vin

9.0V

12.0V

15.0V

18.0V

26.0V

100

Efficiency - %

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Ripple vs Output Current Ripple vs Output Current

0 0.2 0.4 0.6 0.8 1

Thermal Derating (T

Iout-(Amps)

) (See Note 2) Thermal Derating (Ta) (See Note 2)

0.8

85°C

0.6

0.4

0.2

9 121518212427

Vin-(Volts) Vin-(Volts)Vin-(Volts)

70°C

Vin

26.0V

18.0V

15.0V

12.0V

9.0V

(

180

160

140

120

100

Ripple-(mV)

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

0.8

0.6

0.4

Iout-(Amps)

0.2

9 12151821242730333639

85°C

Efficiency vs Output Current

100

Vin

9.0V

12.0V

18.0V

24.0V

30.0V

38.0V

Efficiency - %

0 0.2 0.4 0.6 0.8 1

16.0V

20.0V

24.0V

30.0V

38.0V

Iout-(Amps)

Ripple vs Output Current

400

350

Vin

38.0V

30.0V

24.0V

18.0V

12.0V

9.0V

70°C

300

250

200

150

Ripple-(mV)Iout-(Amps)

100

0 0.2 0.4 0.6 0.8 1

Thermal Derating (T

0.8

0.6

0.4

0.2

16 18 20 22 24 26 28 30 32 34 36 38

Iout-(Amps)

85°C

) (See Note 2)

70°C

60°C

50°C

38.0V

30.0V

24.0V

20.0V

16.0V

Power Dissipation vs Output Current Power Dissipation vs Output Current

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0 0.2 0.4 0.6 0.8 1

Vin

26.0V

18.0V

15.0V

12.0V

9.0V

1.4

1.2

0.8

0.6

PD-(Watts)

0.4

0.2

0 0.2 0.4 0.6 0.8 1

Vin

38.0V

30.0V

24.0V

18.0V

12.0V

9.0V

Power Dissipation vs Output Current

1.8

1.6

1.4

1.2

0.8

PD-(Watts)

0.6

0.4

0.2

0 0.2 0.4 0.6 0.8 1

Vin

38.0V

30.0V

24.0V

20.0V

16.0V

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

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

adjust)

(min)

adjustment range for each model for either series as V

(max).

and V

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 (V and pins 9-11(V

out

Refer to Figure 1 and Table 2 for both the placement and value of the required resistor; either (R1) or R2 as appropriate.

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

. Any capacitance added to the Vo adjust pin will affect

out

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. Note

that the minimum input voltage limits are also model

dependant.

(max) = (8 x Va)V or *30/38V,

Limit is 30V when inhibit function is active.

whichever is less.

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.

≥10V; V

(min) = (Va + 2.5)V

Figure 1

Vin

C1 1

F Ceramic

(Optional)

PT6100/6200/6300

2,3,4

Vin Vo

GND Vo(adj)

125,6,7,8

(R1) Adj Down

R2 Adjust Up

9,10,11

C2 100

(Req’d)

COMCOM

The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulae.

(R1) =

R2 =

Ro (Va – 1.25) V

– V

1.25 R

– V

kΩ

Where: Vo= Original output voltage

= Adjusted output voltage

= The resistance value fromTable 1

Table 1

ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS

1Adc Rated PT6102 PT6101 PT6103 2Adc Rated PT6213 PT6212 PT6214 3Adc Rated PT6303 PT6302 PT6304

Vo (nom) 3.3 5.0 5.0 12.0

Va (min) 1.89 1.88 2.18 2.43

Va (max) 6.07 11.25 8.5 22.12

ΩΩ

Ro (k

Ω) 66.5 150.0 90.9 243.0

ΩΩ

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 PT6102 PT6101 PT6103 2Adc Rated PT6213 PT6212 PT6214 3Adc Rated PT6303 PT6302 PT6304 Vo (nom) 3.3 5.0 5.0 12.0 Va (req.d)

1.9 (30.9)kΩ (31.5)kΩ

2.0 (38.4)kΩ (37.5)kΩ

2.1 (47.1)kΩ (44.0)kΩ

2.2 (57.4)kΩ (50.9)kΩ (30.8)kΩ

2.3 (69.8)kΩ (58.3)kΩ (35.4)kΩ

2.4 (85.0)kΩ (66.3)kΩ (40.2)kΩ

2.5 (104.0)kΩ (75.0)kΩ (45.5)kΩ (32.0)kΩ

2.6 (128.0)kΩ (84.4)kΩ (51.1)kΩ (34.9)kΩ

2.7 (161.0)kΩ (94.6)kΩ (57.3)kΩ (37.9)kΩ

2.8 (206.0)kΩ (106.0)kΩ (64.0)kΩ (40.9)kΩ

2.9 (274.0kΩ (118.0)kΩ (71.4)kΩ (44.1)kΩ

3.0 (388.0)kΩ (131.0)kΩ (79.5)kΩ (47.3)kΩ

3.1 (615.0)kΩ (146.0)kΩ (88.5)kΩ (50.5)kΩ

3.2 (1300.0)kΩ (163.0)kΩ (98.5)kΩ (53.8)kΩ

3.3 (181.0)kΩ (110.0)kΩ (57.3)kΩ

3.4 831.0kΩ (202.0)kΩ (122.0)kΩ (60.8)kΩ

3.5 416.0kΩ (225.0)kΩ (136.0)kΩ (64.3)kΩ

3.6 227.0kΩ (252.0)kΩ (153.0)kΩ (68.0)kΩ

3.7 208.0kΩ (283.0)kΩ (171.0)kΩ (71.7)kΩ

3.8 166.0kΩ (319.0)kΩ (193.0)kΩ (75.6)kΩ

3.9 139.0kΩ (361.0)kΩ (219.0)kΩ (79.5)kΩ

4.0 119.0kΩ (413.0)kΩ (250.0)kΩ (83.5)kΩ

4.1 104.0kΩ (475.0)kΩ (288.0)kΩ (87.7)kΩ

4.2 92.4kΩ (533.0)kΩ (335.0)kΩ (91.9)kΩ

4.3 83.1kΩ (654.0)kΩ (396.0)kΩ (96.3)kΩ

4.4 75.6kΩ (788.0)kΩ (477.0)kΩ (101.0)kΩ

4.5 69.3kΩ (975.0)kΩ (591.0)kΩ (105.0)kΩ

4.6 63.9kΩ (1260.0)kΩ (761.0)kΩ (110.0)kΩ

4.7 59.4kΩ (1730.0)kΩ (1050.0)kΩ (115.0)kΩ

4.8 55.4kΩ (1610.0)kΩ (120.0)kΩ

4.9 52.0kΩ (125.0)kΩ

5.0 48.9kΩ (130.0)kΩ

5.1 46.2kΩ 1880.0kΩ 1140.0kΩ (136.0)kΩ

5.2 43.8kΩ 937.0kΩ 568.0kΩ (141.0)kΩ

5.3 41.6kΩ 625.0kΩ 379.0kΩ (147.0)kΩ

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) R2 = Black

ISR ADJUSTMENT RESISTOR VALUES (Cont)

1Adc Rated PT6101 PT6103 2Adc Rated PT6212 PT6214 3Adc Rated PT6302 PT6304 Vo (nom) 5.0 5.0 12.0 Va (req.d)

6.2 156.0kΩ 94.7kΩ (207.0)kΩ

6.4 134.0kΩ 81.2kΩ (223.0)kΩ

6.6 117.0kΩ 71.0kΩ (241.0)kΩ

6.8 104.0kΩ 63.1kΩ (259.0)kΩ

7.0 93.8kΩ 56.8kΩ (279.0)kΩ

7.2 85.2kΩ 51.6kΩ (301.0)kΩ

7.4 78.1kΩ 47.3kΩ (325.0)kΩ

7.6 72.1kΩ 43.7kΩ (351.0)kΩ

7.8 67.0kΩ 40.6kΩ (379.0)kΩ

8.0 62.5kΩ 37.9kΩ (410.0)kΩ

8.2 58.6kΩ 35.5kΩ (444.0)kΩ

8.4 55.1kΩ 33.4kΩ (483.0)kΩ

8.6 52.1kΩ (525.0)kΩ

8.8 49.3kΩ (573.0)kΩ

9.0 46.9kΩ (628.0)kΩ

9.5 41.7kΩ (802.0)kΩ

10.0 37.5kΩ (1060.0)kΩ

10.5 34.1kΩ (1500.0)kΩ

11.0 31.3kΩ

11.5

12.0

12.5 608.0kΩ

13.0 304.0kΩ

13.5 203.0kΩ

14.0 152.0kΩ

14.5 122.0kΩ

15.0 101.0kΩ

15.5 86.8kΩ

16.0 75.9kΩ

16.5 67.5kΩ

17.0 60.8kΩ

17.5 55.2kΩ

18.0 50.6kΩ

18.5 46.7kΩ

19.0 43.4kΩ

19.5 40.5kΩ

20.0 38.0kΩ

20.5 35.7kΩ

21.5 33.8kΩ

21.5 32.0kΩ

22.0 30.4kΩ

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.

The ISR functions normally with Pin 1 open-circuit, providing a regulated output whenever a valid source voltage is applied to V signal is applied to Pin 1, the regulator output will be disabled.

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

stby

, (pins 2, 3, & 4). When a low-level2 ground

÷ 155kΩ ± 20%

Figure 1

Inh

COM

C1, 1µF (Optional)

PT6100/6210/6300

2,3,4

Vin Vo

GND Vo(adj)

Inh*

Q1 BSS138

9,10,11

125,6,7,8

100

out

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.

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.

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.

Figure 2

(Vdc)

-0.2 0 0.2 0.4 0.6 0.8 1 t (mill i -secs)

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

IMPORTANT NOTICE

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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 pub lication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

TEXAS INSTRUMENTS SLTS029A Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual