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8-A, 3.3-V INPUT NONISOLATED WIDE-OUTPUT ADJUST SIP MODULE

FEATURES APPLICATIONS

DESCRIPTION

PTV03010W

SLTS241A – FEBRUARY 2005 – REVISED JULY 2007

• Multivoltage Digital Systems

• Up to 8-A Output Current

• High-Density Logic Circuits

• 3.3-V Input Bus

• High-End Computers and Servers

• Wide-Output Voltage Adjust

• 3.3-V Intermediate Bus Architectures

(0.8 V to 2.5 V)

• Efficiencies up to 93%

• On/Off Inhibit

• Prebias Start-Up

• Undervoltage Lockout

• Auto-Track™ Sequencing

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

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

• Safety Agency Approvals:

UL/IEC/CSA-22.2 60950-1

• POLA™ Compatible

The PTV03010W is a ready-to-use nonisolated power module, and part of a new class of complete dc/dc

switching regulators from Texas Instruments. These regulators combine high performance with double-sided,

surface-mount construction, to give designers the flexibility to power the most complex multiprocessor digital

systems using off-the-shelf catalog parts.

The PTV03010W series is produced in a 8-pin, single in-line pin (SIP) package. The SIP footprint minimizes

board space, and offers an alternate package option for space conscious applications. Operating from a 3.3-V

input bus, the series provides step-down conversion to a wide range of output voltages, at up to 8 A of output

current. The output voltage can be set to any value over the range, 0.8 V to 2.5 V. The output voltage is set

using a single external resistor.

This series includes Auto-Track™. Auto-Track™ simplifies the task of supply-voltage sequencing in a power

system by enabling the output voltage of multiple modules to accurately track each other, or any external

voltage, during power up and power down.

Other operating features include an on/off inhibit, and the ability to start up into an existing output voltage or

prebias. A nonlatching overcurrent trip protects against load faults.

Target applications include complex multivoltage, multiprocessor systems that incorporate the industry's

high-speed microprocessors, bus drivers, and the TMS320™ DSP family.

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.

POLA, Auto-Track, TMS320 are trademarks of Texas Instruments.

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 (19 pages)

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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 8-A, 3.3-V INPUT NONISOLATED WIDE-OUTPUT ADJUST SIP MODULE FEATURES APPLICATIONS • • • • • • • • • • • • • • • • Up to 8-A Output Current 3.3-V Input Bus Wide-Output Voltage Adjust (0.8 V to 2.5 V) Efficiencies up to 93% On/Off Inhibit Prebias Start-Up Undervoltage Lockout Auto-Track™ Sequencing Output Overcurrent Protection (Nonlatching, Auto-Reset) Operating Temperature: –40°C to 85°C Safety Agency Approvals: UL/IEC/CSA-22.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 STANDARD APPLICATION Track 5 Track VI 8 VI Inhibit GND 6 7 C1* 100 mF (Required) Inhibit VO PTV03010 VO 2, 3 VOAdj 1 4 C2* 10 mF Ceramic (Required) RSET# 1% 0.05 W (Required) C3* 100 mF (Optional) C4* 10 mF Ceramic (Optional) GND L O A D GND * See the Application Information section for capacitor recommendations. #R SET is required to adjust the output voltage higher than its lowest value.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 ELECTRICAL CHARACTERISTICS operating at 25C free-air temperature, VI = 3.3 V, VO = 2.5 V, C1 = 100 µF, C2 = 10 µF, C3 = 0 µF, and IO = IO max (unless otherwise noted) PARAMETER TEST CONDITIONS IO Output current Natural convection airflow VI Input voltage range Over IO load range MIN TYP MAX 0 2.95 η ±2 (2) A V %Vo Temperature variation –40°C < TA < 85°C ±0.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 TYPICAL CHARACTERISTICS (3.3-V INPUT) (8) (9) EFFICIENCY vs OUTPUT CURRENT 100 OUTPUT VOLTAGE RIPPLE vs OUTPUT CURRENT 60 VO- Output Ripple Voltage - mVPP VO = 2.5 V Efficiency - % 90 80 VO = 1.5 V VO = 1.2 V 70 VO = 0.8 V 60 50 0 2 1 3 4 5 6 7 10 0 0 1 2 3 4 5 6 7 IO - Output Current - A Figure 1. Figure 2. POWER DISSIPATION vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 80 1.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 DEVICE INFORMATION TERMINAL FUNCTIONS TERMINAL NAME DESCRIPTION NO. VI 8 VO 2, 3 The regulated positive power output with respect to the GND node. GND 1, 6 This is the common ground connection for the VI and VO power connections. It is also the 0-Vdc reference for the control inputs. Inhibit 7 The Inhibit pin is an open-collector/drain, active-low input that is referenced to GND.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 APPLICATION INFORMATION Capacitor Recommendations for the PTV03010W Power Module Input Capacitors The required input capacitors are a 10-µF ceramic and a minimum of 100-µF electrolytic type. The 100-µF capacitance must be rated for 300 mArms ripple current capability. See Table 1. The above ripple current requirements are conditional that the 10-µF ceramic capacitor is present.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 APPLICATION INFORMATION (continued) Table 1. Input/Output Capacitors (1) Capacitor Characteristics Quantity Working Voltage (V) Value (µF) Max ESR at 100 kHz (Ω) Max Ripple Current at 85°C (Irms) (mA) Panasonic, Aluminum 10 330 0.117 555 8 × 11,5 1 1 EEUFC1A331 FC (Radial) 16 220 0.117 555 8 × 11,5 1 1 EEUFC1C221 FK (SMD) 6.3 470 0.16 600 8 × 10,2 1 1 EEVFK0J471P PSA,Poly-Alum (Radial) 6.3 220 0.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 Designing for Fast Load Transients The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of 1 A/µs. The typical voltage deviation for this load transient is given in the data sheet specification table using the optional value of output capacitance.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 Table 3. Calculated Values of RSET for Other Output Voltages VO RSET VO RSET 0.800 Open 1.450 9.82 kΩ 0.825 318 kΩ 1.500 8.94 kΩ 0.850 158 kΩ 1.550 8.18 kΩ 0.875 104 kΩ 1.600 7.51 kΩ 0.900 77.5 kΩ 1.650 6.92 kΩ 0.925 61.5 kΩ 1.700 6.40 kΩ 0.950 50.8 kΩ 1.750 5.93 kΩ 0.975 43.2 kΩ 1.800 5.51 kΩ 1.000 37.5 kΩ 1.850 5.13 kΩ 1.025 33.1 kΩ 1.900 4.78 kΩ 1.050 29.5 kΩ 1.950 4.47 kΩ 1.075 26.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 Soft-Start Power Up The Auto-Track feature allows the power up of multiple PTH/PTV modules to be directly controlled from the Track pin. However, in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track pin is directly connected to the input voltage, VI (see Figure 7). Track 3.3 V 1.8 V GND Adjust RSET C2 10 mF 5.49 kW 1%, 0.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 Output On/Off Inhibit For applications requiring output voltage on/off control, the modules incorporate an output Inhibit control. The inhibit feature can be used wherever there is a requirement for the output voltage from the regulator to be turned off. The power modules function normally when the Inhibit input is left open-circuit, providing a regulated output whenever a valid source voltage is connected to VI with respect to GND.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 Overcurrent Protection (OCP) For protection against load faults, the modules incorporate output overcurrent protection. Applying a load that exceeds the overcurrent threshold causes the regulated output to shut down. Following shutdown, a module periodically attempts to recover by initiating a soft-start power up.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 The same circuit also provides a power-down sequence. When the input voltage falls below U3's voltage threshold, the ground signal is reapplied to the common track control. This pulls the track inputs to zero volts, forcing the output of each module to follow, as shown in Figure 13.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 2 U1 Track +3.3 V 3 VO PTH03050W Inhibit GND 4 1 Adjust 5 + + C I1 U3 3 2.21 kΩ 5 SENSE C4 0.1 µF RESET 4 TPS3808G33 1 R TRK # 50 Ω CT 10 U2 GND C3 CO1 RSET1 6 VCC MR Vo1 = 2.5 V 6 VI 9 Up Dn 8 5 Track Sense 2 4700 pF 2 VI VO PTH03060W Inhibit 3 Adjust GND 1 7 4 + # RTRK = 100 Ω / N N = Number of Track pins connected together C I2 Vo2 = 1.2 V 6 RSET2 + CO2 17.4 kΩ Figure 11.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 Prebias Start-Up Capability A prebias start-up condition occurs as a result of an external voltage being present at the output of a power module prior to its output becoming active. This often occurs in complex digital systems when current from another power source is backfed through a dual-supply logic component, such as an FPGA or ASIC.
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PTV03010W www.ti.com SLTS241A – FEBRUARY 2005 – REVISED JULY 2007 NOTES: 1. The prebias start-up feature is not compatible with Auto-Track. If the rise in the output is limited by the voltage applied to the Track control pin, the output sinks current during the period that the track control voltage is below that of the back-feeding source. For this reason, Auto-Track should be disabled when not being used. This is accomplished by connecting the Track pin to the input voltage, VI.
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PACKAGE OPTION ADDENDUM www.ti.com 13-Nov-2010 PACKAGING INFORMATION Orderable Device PTV03010WAH Status (1) ACTIVE Package Type Package Drawing SIP MODULE EVA Pins Package Qty 8 70 Eco Plan (2) Pb-Free (RoHS) Lead/ Ball Finish SN MSL Peak Temp (3) Samples (Requires Login) N / A for Pkg Type Request Free Samples (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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