Datasheet

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FEATURES

DESCRIPTION

APPLICATIONS

STANDARD APPLICATION

PTN78000

(Top View)

SET

(B)

0.05 W, 1 %

(Required)

(A)

Ceramic

(Required)

(A)

100 mF

Electrolytic

(Required)

GND

Inhibit

GND

PTN78000W , PTN78000H

www.ti.com

...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008

1.5-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR

• 1.5-A Output Current

• Wide-Input Voltage

The PTN78000 is a series of high-efficiency,

step-down Integrated Switching Regulators (ISR),

(7 V to 36 V) / (15 V to 36 V)

that represent the third generation in the evolution of

• Wide-Output Voltage Adjust

the popular 78ST100 series of products. In new

(2.5 V to 12.6 V) / (11.85 V to 22 V)

designs it should be considered in place of the

• High Efficiency (Up to 95%)

78ST100, PT78ST100, PT5100, and PT6100 series

of single in-line pin (SIP) products. The PTN78000 is

• On/Off Inhibit

smaller and lighter than its predecessors, and has

• Undervoltage Lockout

either similar or improved electrical performance

• Output Current Limit

characteristics. The case-less, double-sided package,

also exhibits improved thermal characteristics, and is

• Overtemperature Shutdown

compatible with TI ' s roadmap for RoHS and lead-free

• Operating Temperature: – 40 ° C to 85 ° C

compliance.

• Surface Mount Package Available

Operating from a wide-input voltage range, the

PTN78000 provides high-efficiency, step-down

voltage conversion for loads of up to 1.5 A. The

• General-Purpose, Industrial Controls,

output voltage is set using a single external resistor.

HVAC Systems, Test and Measurement,

The PTN78000W may be set to any value within the

Medical Instrumentation, AC/DC Adaptors,

range, 2.5 V to 12.6 V, and the PTN78000H from

Vehicles, Marine, and Avionics

11.85 V to 22 V. The output voltage of the

PTN78000W can be as little as 2 V lower than the

input, allowing operation down to 7 V, with an output

voltage of 5 V. The output voltage of the PTN78000H

can be as little as 3 V lower than the input, alowing

operation down to 15 V, with an output voltage of

12 V.

The PTN78000 has undervoltage lockout and an

integral on/off inhibit. The modules are suited to a

wide variety of general-purpose applications that

operate off 12-V, 24-V, or 28-V

power.

(A) See the Application Information section for

capacitor recommendations. The minimum input

capacitance is 2.2 µ F for PTN78000W, and 9.4 µ F (2

x 4.7 µ F) for PTN78000H.

(B) R

SET

is required to adjust the output voltage

higher than 2.5 V for PTN78000W, and high than

11.824 V for PTN78000H. See the Application

Information section for specific values.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (26 pages)

PAGE 1
PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 1.5-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR FEATURES 1 • • DESCRIPTION 1.5-A Output Current Wide-Input Voltage (7 V to 36 V) / (15 V to 36 V) Wide-Output Voltage Adjust (2.5 V to 12.6 V) / (11.
PAGE 2
PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
PAGE 3
PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 ELECTRICAL CHARACTERISTICS operating at 25°C free-air temperature, VI = 20 V, VO = 5 V, IO = IO (max), CI = 2.
PAGE 4
PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS operating at 25°C free-air temperature, VI = 24 V, VO = 12 V, IO = IO (max), CI = 2× 4.7 µF, CO = 100 µF (unless otherwise noted) PARAMETER IO Output current PTN78000H TEST CONDITIONS TA = 85°C, natural convection airflow MIN VO = 12 V 0.1 VO = 15 V 0.
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PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 PIN ASSIGNMENT 5 1 2 PTN78000 (Top View) 3 4 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION This is the common ground connection for the VI and VO power connections. It is also the 0 Vdc reference for the Inhibit and VO Adjust control inputs.
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PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (7-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT 100 50 VO = 5 V V O − Output Voltage Ripple − mV PP VO = 3.3 V Efficiency − % 90 80 VO = 2.5 V 70 60 50 40 30 VO = 2.5 V 20 VO = 3.3 V 10 VO = 5 V 0 0 0.3 0.6 0.
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PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 TYPICAL CHARACTERISTICS (15-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT 100 V O − Output Voltage Ripple − mV PP VO = 12 V VO = 9 V Efficiency − % 90 80 VO = 5 V 70 VO = 3.3 V 60 VO = 2.5 V 1.
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PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (24-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT VO - Output Voltage Ripple - mVPP VO = 15 V VO = 12 V 80 VO = 5 V 70 VO = 3.3 V 60 VO = 2.5 V 50 0 0.3 0.6 0.9 1.2 VO = 12 V 100 VO = 12 V 80 60 VO = 5 V 40 20 0 0.3 0.6 0.9 1.2 0.5 VO = 2.5 V 0 1.
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PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 TYPICAL CHARACTERISTICS (32-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT 100 VO -Output Voltage Ripple - mVPP 70 60 VO = 5 V 50 40 VO = 3.3 V 30 20 0 0.3 0.6 0.9 1.2 VO = 22 V 200 VO = 9 V 150 0 0 1.5 1 VO = 5 V VO = 3.3 V 0.5 0 0.
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PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com APPLICATION INFORMATION Adjusting the Output Voltage of the PTN78000 Wide-Output Adjust Power Modules General A resistor must be connected between the VO Adjust control (pin 4) and GND (pin 1) to set the output voltage. The adjustment range is from 2.5 V to 12.6 V for PTN78000W.
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PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 As an example, Table 2 gives the operating input voltage range for the common output bus voltages. In addition, the Electrical Characteristics define the available output voltage adjust range for various input voltages. Table 2.
PAGE 12
PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com Table 3. PTN78000W Output Voltage Set-Point Resistor Values 12 VO (V) RSET (kΩ) VO (V) RSET (kΩ) VO (V) RSET (kΩ) VO (V) RSET (kΩ) 2.50 Open 3.7 50.7 6.1 12.6 9.0 4.07 2.55 1370 3.8 46.3 6.2 12.1 9.2 3.75 2.60 680 3.9 42.5 6.3 11.6 9.4 3.46 2.65 451 4.0 39.
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PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 Table 4. PTN78000H Output Voltage Set-Point Resistor Values VO (V) RSET (kΩ) VO (V) RSET (kΩ) VO (V) RSET (kΩ) 11.85 2633 13.50 34.3 17.20 6.12 11.90 896 13.65 30.9 17.40 5.66 11.95 538 13.80 28.1 17.60 5.23 12.00 383 13.95 25.6 17.80 4.83 12.10 242 14.10 23.
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PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com CAPACITOR RECOMMENDATIONS FOR PTN78000 WIDE-OUTPUT ADJUST POWER MODULES PTN78000W Input Capacitor The minimum requirement for the input of PTN78000W is 2.2 µF of ceramic capacitance. The dielectric may be either an X5R or X7R temperature characteristic.
PAGE 15
PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 Tantalum Capacitors Tantalum type capacitors may be used at the output, and are recommended for applications where the ambient operating temperature can be less than 0°C.
PAGE 16
PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com Table 5. Recommended Input/Output Capacitors (PTN78000W) (continued) CAPACITOR CHARACTERISTICS QUANTITY WORKING VOLTAGE (V) VALUE (µF) EQUIVALENT SERIES RESISTANCE (ESR) (Ω) 85°C MAXIMUM RIPPLE CURRENT (Irms) (mA) SVP (SMD) 20 100 0.024 2500 SP 16 100 0.
PAGE 17
PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 Table 6. Recommended Input/Output Capacitors (PTN78000H) CAPACITOR CHARACTERISTICS QUANTITY WORKING VOLTAGE (V) VALUE (µF) EQUIVALENT SERIES RESISTANCE (ESR) (Ω) 85°C MAXIMUM RIPPLE CURRENT (Irms) (mA) FC (Radial) 50 100 0.162 615 10 × 12,5 1 1 EEUFC1H1081 FK (SMD) 50 150 0.
PAGE 18
PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com Power-Up Characteristics When configured per the standard application, the PTN78000 power module produces a regulated output voltage following the application of a valid input source voltage.
PAGE 19
PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 Output On/Off Inhibit For applications requiring output voltage on/off control, the PTN78000 power module incorporates an output on/off Inhibit control (pin 3). The inhibit feature can be used wherever there is a requirement for the output voltage from the regulator to be turned off.
PAGE 20
PTN78000W, PTN78000H SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008...................................................................................................................................... www.ti.com Optional Input/Output Filters Power modules include internal input and output ceramic capacitors in all their designs. However, some applications require much lower levels of either input reflected or output ripple/noise.
PAGE 21
PTN78000W, PTN78000H www.ti.com...................................................................................................................................... SLTS230C – NOVEMBER 2004 – REVISED SEPTEMBER 2008 L1 1 µH to 5 µH VI VI A C1 2.2 µF 50 V Ceramic L2 1 µH to 5 µH PTN78000W 2 Vo Inhibit C2 2.2 µF 50 V Ceramic (Required) 1 Vo B Adjust GND 3 5 + 4 RSET + C3 100 µF (Required) GND C5 C4 2.2 µF Ceramic GND UDG−05087 Figure 32.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 26-Aug-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
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