Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPTH12050LAZT

6-A, 12-V INPUT NON-ISOLATED WIDE-OUTPUT

FEATURES APPLICATIONS

NOMINAL SIZE = 0.87 i x 0.5 i

(22,1 mm x 12,57 mm)

DESCRIPTION

PTH12050W/L

SLTS214H – MAY 2003 – REVISED OCTOBER 2007

www.ti.com

ADJUST POWER MODULE

• Telecom, Industrial, and General-Purpose

• Up to 6-A Output Current

Circuits

• 12-V Input Voltage

• Wide-Output Voltage Adjust

(1.2 V to 5.5 V)/(0.8 V to 1.8 V)

• Efficiencies up to 93%

• 200 W/in

Power Density

• On/Off Inhibit

• Undervoltage Lockout

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

• Auto-Track™ Sequencing

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Safety Agency Approvals:

UL/IEC/CSA-22.2 60950-1

• Point-of-Load Alliance ( POLA™) Compatible

The PTH12050 series is the smallest non-isolated power modules that features Auto-Track™ Sequencing.

Auto-Track simplifies the sequencing of supply voltages in power systems by enabling modules to track each

other, or any other external voltage, during power up and power down.

Although small in size (0.87 inches × 0.5 inches), these modules are rated for up to 6 A of output current, and

are an ideal choice in applications where space, performance, and a power-up sequencing capability are

important attributes.

The series operates from an input voltage of 12-V to provide step-down conversion to a wide range of output

voltages. The output voltage of the W-suffix device may set to any voltage over the adjust range, 1.2 V to 5.5 V.

The L-suffix device has an adjustment range of 0.8 V to 1.8 V. The output voltage is set within the adjustment

range using a single external resistor.

Other operating features include an on/off inhibit, output voltage adjust (trim), and output overcurrent protection.

For high efficiency, these parts employ a synchronous rectifier output stage.

Target applications include telecom, industrial, and general purpose circuits, including low-power dual-voltage

systems that use the TMS320™ DSP family, microprocessor, ASIC, or FPGA.

For start-up into a non-prebiased output, review page 14 in the Application Information section.

For start-up into a prebiased output, review page 18 in the Application Information section.

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.

2 Auto-Track, POLA, 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 (26 pages)

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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 6-A, 12-V INPUT NON-ISOLATED WIDE-OUTPUT ADJUST POWER MODULE FEATURES APPLICATIONS • Up to 6-A Output Current • 12-V Input Voltage • Wide-Output Voltage Adjust (1.2 V to 5.5 V)/(0.8 V to 1.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 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. STANDARD APPLICATION 2 VI 3 PTH12050 (Top View) 4 C1 100 mF (Required) C2 10 mF Ceramic VO 6 1 Track 5 RSET, 1% (Required) C3 100 mF (Optional) Inhibit GND GND A.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 ELECTRICAL CHARACTERISTICS TA = 25°C; VI = 12 V; VO = 3.3 V; C1 = 100 µF, C2 = 10 µF, C3 = 0 µF, and IO = IO(max) (unless otherwise stated) PARAMETER TEST CONDITIONS PTH12050W MIN IO Output current VI Input voltage range Vo Over ΔVadj range 85°C, 400 LFM airflow TYP 0 60°C, natural convection Over IO range 10.8 Set-point voltage tolerance tol UNIT MAX 6 (1) A 6 (1) A 13.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 ELECTRICAL CHARACTERISTICS TA = 25°C; VI = 12 V; VO = 1.8 V; C1 = 100 µF, C2 = 10 µF, C3 = 0 µF, and IO = IO(max) (unless otherwise stated) PARAMETER TEST CONDITIONS PTH12050L MIN Over ΔVadj range 85°C, 400 LFM airflow TYP 0 UNIT MAX 6 (1) A 6 (1) A IO Output current VI Input voltage range VOtol Set-point voltage tolerance ΔRegtemp Temperature variation –40°C
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 DEVICE INFORMATION Terminal Functions TERMINAL NAME NO. DESCRIPTION VI 3 The positive input voltage power node to the module, which is referenced to common GND. VO 6 The regulated positive power output with respect to the GND node. GND 1 This is the common ground connection for the VI and VO power connections. It is also the 0-VDC reference for the control inputs.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 PTH12050W TYPICAL CHARACTERISTICS (VI = 12 V) (1) (2) EFFICIENCY vs LOAD CURRENT OUTPUT RIPPLE vs LOAD CURRENT 10 0 POWER DISSIPATION vs LOAD CURRENT 4 80 VO = 3.3 V VO = 5 V VO = 2.5 V PD − Power Dissipation − W 90 80 VO = 2 V VO = 1.5 V VO = 1.8 V VO = 1.2 V 70 Output Ripple − mV Efficiency − % 60 VOUT = 5 V VOUT = 2 V 40 VOUT = 2.5 V VOUT = 3.3 V 20 60 VOUT = 1.8 V 50 0 0 1 2 3 4 5 0 6 1 2 3 1 VOUT = 1.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 PTH12050L TYPICAL CHARACTERISTICS (VI = 12 V) (1) (2) EFFICIENCY vs LOAD CURRENT OUTPUT RIPPLE vs LOAD CURRENT 100 POWER DISSIPATION vs LOAD CURRENT 1. 8 50 VOUT = 1.8 V VO = 1.5 V 80 VO = 0.8 V 1. 5 40 VOUT = 1.5 V Output Ripple − mV Efficiency - % VO = 1.8 V VO = 1 V 70 VOUT = 1.8 V PD − Power Dissipation − W VO = 1.2 V 90 30 20 VOUT = 1.2 V 10 60 VOUT = 0.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 APPLICATION INFORMATION ADJUSTING THE OUTPUT VOLTAGE The VOAdjust control (pin 5) sets the output voltage of the PTH12050 product. The adjustment range is from 1.2 V to 5.5 V for the W-suffix modules and 0.8 V to 1.8 V for L-suffix modules. The adjustment method requires the addition of a single external resistor, RSET, that must be connected directly between the VOAdjust and GND pins.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 Use Equation 1 to calculate the adjust resistor value. See Table 2 for parameters, Rs and Vmin. Equation 1. Output Voltage Adjust Table 2. Adjust Formula Parameters OUTPUT VOLTAGE ADJUST EQUATION R set + 10 kW 0.8 V V out * V *R min S kW (1) Parameter PTH12050W PTH12050L V(MIN) 1.2 V 0.8 V V(MAX) 5.5 V 1.8 V RS 1.82 kΩ 7.87 kΩ Table 3.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 CAPACITOR RECOMMENDATIONS FOR THE PTH12050 SERIES OF POWER MODULES Input Capacitor The recommended input capacitor(s) is determined by the 100 µF minimum capacitance and 750 mArms minimum ripple current rating. A 10-µF X5R/X7R ceramic capacitor may also be added to reduce the reflected input ripple current. This is recommended for output voltage set points of 3.3 V and higher.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 Table 4. Input/Output Capacitors (1) Capacitor Characteristics Capacitor Vendor, Type/Series (Style) Working Value Voltage (µF) (V) Quantity Max ESR at 100 kHz (Ω) Max Ripple Current at 85°C (Irms) (mA) Physical Size (mm) Input Bus Output Bus Vendor Number Panasonic, Aluminum 25 330 0.090 775 10 × 12,5 1 1 EEUFC1E331 FC (Radial) 35 180 0.090 775 10 × 12,5 1 1 EEUFC1V181 FK (SMD) 25 470 0.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 Designing for Very 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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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 POWER-UP INTO A NON-PREBIASED OUTPUT — AUTO-TRACK™ FUNCTION The Auto-Track function is unique to the PTH/PTV family, and is available with all 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.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 Q1VDS (2 V/div) VO (2 V/div) II (2 A/div) t − Time − 40 ms/div Figure 12. Power-Up from Track Control NOTE: If a prebias condition is not present, it is highly recommended that the Track control pin be used for controlled power-up and power-down. If Track control is not used, the output voltage starts up and overshoots by as much as 10%, before settling at the output voltage setpoint.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 Typical Auto-Track Application The basic implementation of Auto-Track allows for simultaneous voltage sequencing of a number of Auto-Track compliant modules. Connecting the Track inputs of two or more modules forces their track input to follow the same collective RC-ramp waveform, and allows their power-up sequence to be coordinated from a common Track control signal.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 2 U1 Track VI = 12 V 3 Vo 1 = 3.3 V 6 VI VO PTH12050W Inhibit GND 4 1 Adjust 5 + + CI1 CO1 RSET1 2.0 kΩ 8 U3 VCC 7 SENSE RESET 2 5 RTRK # RESIN 1 3 50 Ω TL7712A REF 0.1 µF 9 Up Dn RESET 8 5 Track Sense CT 2 GND CREF 10 U2 6 CT 3.3 µF 4 VI VO PTH12060W Vo 2 = 1.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 POWER-UP INTO A PREBIASED OUTPUT — START-UP USING INHIBIT CONTROL The capability to start up into an output prebias condition is now available to all the 12-V input, PTH series of power modules. (Note that this is a feature enhancement for the many of the W-suffix products) [1]. A prebias startup condition occurs as a result of an external voltage being present at the output of a power module prior to its output becoming active.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 10 9 Up VI = 12 V 2 VI 5 Sense GND 1 7 C1 330 mF 10 9 R3 11 k0 TL7702B 8 7 R4 100 kW C5 0.1 mF PTH12010L Inhibit 3 8 VCC SENSE 5 RESET 2 RESIN 1 REF 6 RESET 3 CT GND 4 R5 C6 10 k0 0.68 mF VI GND 1 7 6 Adjust 4 R1 2 kW Tra ck 2 VO PTH12020W Inhibit 3 + 8 Dn Tra ck VO1 = 3.3 V + C2 330 mF 5 Sense VO 6 Vadj 4 VO2 = 1.8 V + IO2 R1 130 W + C3 330 mF VC ORE + C4 330 mF VC CI O ASIC Figure 17.
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PTH12050W/L www.ti.com SLTS214H – MAY 2003 – REVISED OCTOBER 2007 Overcurrent Protection For protection against load faults, all modules incorporate output overcurrent protection. Applying a load that exceeds the regulator's 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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PTH12050W/L www.ti.
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PTH12050W/L www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 8-Dec-2010 Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.
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