Datasheet

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SLTS215B – MAY 2003 – REVISED DECEMBER 2003

Standard Application

Features

• Up to 10-A Output Current

• 3.3-V Input Voltage

• Wide-Output Voltage Adjust

(0.8 V to 2.5 V)

• Efficiencies up to 96 %

• 114 W/in³ Power Density

• On/Off Inhibit

• Output Voltage Sense

• Pre-Bias Startup

• Margin Up/Down Controls

• Under-Voltage Lockout

• Auto-Track™ Sequencing

• Output Over-Current Protection

(Non-Latching, Auto-Reset)

• Operating Temp: –40 to +85 °C

• DSP Compatible Output Voltages

• Safety Agency Approvals:

UL 1950, CSA 22.2 950, EN60950

VDE (Pending)

• Point-of-Load Alliance (POLA)

Compatible

Description

The PTH03060W non-isolated power

module is small in size but big on per-

formance and flexibility. Its high output

current, compact footprint, and industry-

leading features offers system designers

a versatile module for powering complex

multi-processor digital systems.

This product employs double-sided

surface mount construction and provides

high-performance step-down power

conversion for up to 10 A of output cur-

rent from a 3.3-V input bus voltage.

The output voltage is adjustable and can

be set to any value over the range, 0.8 V to

2.5 V, using a single resistor.

This series includes Auto-Track™

Sequencing. Auto-Track simplifies the

task of supply voltage sequencing in a

power system by enabling modules to

track each other, or any external voltage,

during power up and power down.

Other operating features include an

on/off inhibit, margin up/down controls,

and the ability to start up into an existing

output voltage or prebias. To ensure tight

load regulation, an output voltage sense

is also provided. A non-latching over-

current trip serves as load fault protection.

Target applications include complex

multi-voltage, multi-processor systems

that incorporate the industry’s high-speed

DSPs, micro-processors and bus drivers.

Auto-Track™

Sequencing

Pin Configuration

Pin Function

1 GND

3 Inhibit *

Adjust

Sense

out

7 GND

8 Track

9 Margin Down *

10 Margin Up *

* Denotes negative logic:

Open = Normal operation

Ground = Function active

NOMINAL SIZE = 1 in x 0.62 in

(25,4 mm x 15,75 mm)

Margin Up

Margin Down

330 µF

(Required)

OUT

330 µF

(Optional)

Inhibit

GND GND

OUT

Sense

Track

SET

1 %, 0.1 W

(Required)

PTH03060W

(Top View)

10 9 8

543

PTH03060W —3.3 V Input

10-A, 3.3-V Input Non-Isolated

Step-Down Switching Power Module

set

= Required to set the output voltage to a value

higher than 0.8 V. (See spec. table for values)

= Required 330 µF capacitor

out

= Optional 330 µF capacitor

Summary of content (19 pages)

PAGE 1
PTH03060W —3.3 V Input 10-A, 3.3-V Input Non-Isolated Step-Down Switching Power Module SLTS215B – MAY 2003 – REVISED DECEMBER 2003 Features NOMINAL SIZE = • Up to 10-A Output Current • 3.3-V Input Voltage • Wide-Output Voltage Adjust (0.8 V to 2.5 V) • Efficiencies up to 96 % • 114 W/in³ Power Density • On/Off Inhibit • Output Voltage Sense • Pre-Bias Startup • Margin Up/Down Controls • Under-Voltage Lockout 1 in x 0.
PAGE 2
PTH03060W —3.3 V Input 10-A, 3.3-V Input Non-Isolated Step-Down Switching Power Module SLTS215B – MAY 2003 – REVISED DECEMBER 2003 Ordering Information Output Voltage (PTH03060Hxx) Package Options (PTH03060xHH) (1) Code W Code AH AS Voltage 0.8 V – 2.5 V (Adjust) Description Horiz. T/H SMD, Standard (3) Pkg Ref. (2) (EUW) (EUY) Notes: (1) Add “T” to end of part number for tape and reel on SMD packages only.
PAGE 3
PTH03060W —3.3 V Input 10-A, 3.
PAGE 4
Typical Characteristics PTH03060W —3.3 V Input 10-A, 3.3-V Input Non-Isolated Step-Down Switching Power Module SLTS215B – MAY 2003 – REVISED DECEMBER 2003 Characteristic Data; Vin =3.3 V Safe Operating Area; Vin =3.3 V (See Note A) Efficiency vs Load Current (See Note B) Output Voltage =2.5 V 100 90 Efficiency - % VOUT 2.5 V 2.0 V 1.8 V 1.5 V 1.2 V 1.
PAGE 5
Application Notes PTH03060W & PTH05060W Capacitor Recommendations for the PTH03060 & PTH05060 Series of Power Modules Input Capacitor The recommended input capacitor(s) is determined by the 330 µF minimum capacitance and 500 mArms minimum ripple current rating. Ripple current, less than 150 mΩ equivalent series resistance (ESR), and temperature are the major considerations when selecting input capacitors.
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Application Notes PTH03060W & PTH05060W Table 2-1: Input/Output Capacitors Capacitor Vendor, Type Series (Style) Capacitor Characteristics Quantity Working Voltage Value (µF) Max. ESR at 100 kHz Max. Ripple Current at 85 °C (Irms) Physical Size (mm) Input Bus Output Bus Panasonic, Aluminum FC (Radial) FK (SMD) FC (SMD) 10 V 25 V 16 V 330 470 330 0.117 Ω 0.080 Ω 0.150 Ω 555 mA 850 mA 670 mA 8×10 10×10.2 10×10.
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Application Notes PTH03060W & PTH05060W Adjusting the Output Voltage of the PTH03060W & PTH05060W Wide-Output Adjust Power Modules The Vo Adjust control (pin 4) sets the output voltage of the PTH03060W and PTH05060W products to a value higher than 0.8 V. The adjustment range of the PT03060W (3.3-V input) is from 0.8 V to 2.5 V 1, and the PTH05060W (5-V input) from 0.8 V to 3.6 V. For an output voltage other than 0.
PAGE 8
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) Point-of-Load Alliance The PTH family of non-isolated, wide-output adjust power modules from Texas Instruments are optimized for applications that require a flexible, high performance module that is small in size. These products are part of the “Point-of-Load Alliance” (POLA), which ensures compatible footprint, interoperability and true second sourcing for customer design flexibility.
PAGE 9
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) The power modules function normally when the Inhibit pin is left open-circuit, providing a regulated output whenever a valid source voltage is connected to Vin with respect to GND. Figure 3-3 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control has its own internal pull-up to Vin potential. The input is not compatible with TTL logic devices.
PAGE 10
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) Auto-Track™ Function The Auto-Track function is unique to the PTH family, and is available with the all “Point-of-Load Alliance” (POLA) products. Auto-Track was designed to simplify the amount of circuitry required to make the output voltage from each module power up and power down in sequence.
PAGE 11
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) Figure 3–5; Sequenced Power Up & Power Down Using Auto-Track U1 10 9 8 5 Track PTH05020W VIN Inhibit Vo1 =3.3 V 6 GND + 3 C IN VO 1 + 2 +5 V 4 7 C OUT R2 698 C1 0.1 µF U2 R1 100 k 9 8 5 Track 2 + C IN 0V Figure 3–6; Simultaneous Power Up with Auto-Track Control HORIZ SCALE: 10 ms/Div 10 Q1 BSS138 PTH05010W VIN Inhibit 3 VO Vo2 =1.
PAGE 12
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) Margin Up/Down Controls Notes: The PTHxx060W, PTHxx010W, PTHxx020W, and PTHxx030W products incorporate Margin Up and Margin Down control inputs. These controls allow the output voltage to be momentarily adjusted 1, either up or down, by a nominal 5 %. This provides a convenient method for dynamically testing the operation of the load circuit over its supply margin or range.
PAGE 13
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) Pre-Bias Startup Capability Notes Only selected products in the PTH family incorporate this capability. Consult Table 3-1 to identify which products are compliant. 1. Startup includes the short delay (approx. 10 ms) prior to the output voltage rising, followed by the rise of the output voltage under the module’s internal soft-start control.
PAGE 14
Application Notes PTH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) Remote Sense The PTHxx060W, PTHxx010W, PTHxx020W, and PTHxx030W products incorporate an output voltage sense pin, Vo Sense. The Vo Sense pin should be connected to Vout at the load circuit (see data sheet standard application). A remote sense improves the load regulation performance of the module by allowing it to compensate for any ‘IR’ voltage drop between itself and the load.
PAGE 15
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 13-Nov-2010 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.