PTH04000W
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SLTS247B – JUNE 2005 – REVISED OCTOBER 2007
3-A, 3.3/5-V INPUT, ADJUSTABLE SWITCHING REGULATOR
WITH AUTO-TRACK™ SEQUENCING
FEATURES
1
• Up to 3-A Output Current at 85°C
• 3.3-V / 5-V Input Voltage
• Wide-Output Voltage Adjust
(0.9 V to 3.6 V)
• Efficiencies Up To 94%
• On/Off Inhibit
• Undervoltage Lockout (UVLO)
• Output Overcurrent Protection
(Nonlatching, Auto-Reset)
• Overtemperature Protection
• Ambient Temperature Range: –40°C to 85°C
2
•
•
•
Point-of-Load Alliance (POLA™) Compatible
Surface Mount Package
Safety Agency Approvals:
- UL/IEC/CSA-22.2 60950-1
APPLICATIONS
•
Telecommunications, Instrumentation,
and General-Purpose Circuits
DESCRIPTION
The PTH04000W is a highly integrated, low-cost switching regulator module that delivers up to 3 A of output
current. Occupying a small PCB area, the PTH04000W provides output current at a high efficiency and with
minimal power dissipation, thereby eliminating the need for a heat sink. Their small size (0.75 inch × 0.5 inch),
high efficiency, and low cost makes these modules practical for a variety of applications.
The input voltage range of the PTH04000W is from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V
input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH04000W can step down to
voltages as low as 0.9 V from a 5-V input bus, with typically less than 1 W of power dissipation. The output
voltage can be adjusted to any voltage over the range, 0.9 V to 3.6 V, using a single external resistor. This series
includes Auto-Track™ sequencing. This feature 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 undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection,
and overtemperature protection. Target applications include telecommunications, test and measurement
applications, and high-end consumer products. The modules are available in both through-hole and
surface-mount package options, including tape and reel. The PTH04000W is also compatible with TI's roadmap
for RoHS and lead-free compliance.
STANDARD APPLICATION
1
Track
VO
6
2
VI
Inhibit
3
CI*
47 µF
(Required)
PTH04000W
(Top View)
4
5
+
CO*
47 µF
(Optional)
RSET#
1%, 0.1 W
(Required)
GND
GND
* See the Application Information section for capacitor recommendations.
# See the Application Information section for RSET values.
1
2
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.
Copyright © 2005–2007, Texas Instruments Incorporated
PTH04000W
www.ti.com
SLTS247B – JUNE 2005 – 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.
ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see
the TI website at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted (1)
TA
Tstg
(1)
(2)
PTH04000W
UNIT
-40 to 85
°C
Operating free-air temperature
Over VI range
Lead temperature (H suffix)
5 seconds
Solder reflow temperature (S suffix)
Surface temperature of module body or pins
235
Solder reflow temperature (Z suffix) (2)
Surface temperature of module body or pins
260 (2)
260
Storage temperature
°C
°C
-55 to 125
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Moisture Sensitivity Level (MSL) Rating Level-3-260C-168HR
RECOMMENDED OPERATING CONDITIONS
VI
Input voltage
TA
Operating free-air temperature
MIN
MAX
3
5.5
UNIT
V
-40
85
°C
PACKAGE SPECIFICATIONS
PTH04000Wx (Suffix AH, AS and AZ)
Weight
Flammability
Mechanical shock
Mechanical vibration
(1)
2
1.5 grams
Meets UL 94 V-O
Per Mil-STD-883D, Method 2002.3, 1 msec, sine, mounted
Mil-STD-883D, Method 2007.2, 20-2000 Hz
500 G
20 G
(1)
(1)
Qualification limit.
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ELECTRICAL CHARACTERISTICS
at 25°C free-air temperature, VI = 5 V, VO = 3.3 V, IO = IO(Max), CI = 47 µF (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
UNIT
TA = 25°C, natural convection
VI
Input voltage range
Over IO range
VO(TOL)
Set-point voltage tolerance
TA = 25°C
Temperature variation
–40°C ≤ TA ≤ 85°C
±0.5
%VO
Line regulation
Over VI range
±1
mV
Load regulation
Over IO range
±5
Total output voltage variation
Includes set-point, line, load,
–40°C ≤ TA ≤ 85°C
Output voltage adjust range
3
3
(1)
Output current
VO(ADJ)
0
MAX
IO
(2)
5.5
±2
(3)
A
V
%VO
mV
±3
(3)
VI ≥ 4.5 V
0.9
3.6
VI < 4.5 V
0.9
VI – 1.1 (2)
%VO
V
TA = 25C, IO = 2 A
η
RSET = 475 Ω, VO = 3.3 V
(2)
92%
RSET = 2.32 kΩ, VO = 2.5 V
(2)
89%
RSET = 6.65 kΩ, VO = 1.8 V
86%
RSET = 11.5 kΩ, VO = 1.5 V
84%
RSET = 26.1 kΩ, VO = 1.2 V
82%
RSET = 84.5 kΩ, VO = 1 V
78%
Efficiency
Output voltage ripple
20 MHz bandwith
Overcurrent threshold
Reset, followed by autorecovery
10
mVPP
7
A
1 A/s load step from 50% to 100% IOmax,
CO = 47 µF
Transient response
Recovery time
70
µs
VO over/undershoot
100
mV
IIL track
Track Input Current (pin 2)
Pin to GND
–130
dVtrack/dt
Track Slew Rate Capability
CO ≤ CO(max)
1
UVLO
Undervoltage lockout
VI = increasing
VI = decreasing
Input high voltage (VIH)
Inhibit control (pin 4)
Input low voltage (VIL)
2.95
2.7
VI – 0.5
Open
–0.2
(STBY)
FS
Inhibit (pin 4) to GND, Track (pin 2) open
Switching frequency
Over VI and IO ranges
External input capacitance
Ceramic type (C1)
47
(5)
Ceramic type (C2)
0
(6)
External output capacitance
(6)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Calculated reliability
Per Telcordia SR-332, 50% stress,
TA = 40C, ground benign
700
mA
kHz
µF
150
47
4
V
µA
1
Nonceramic type (C3)
Equivalent series resistance (nonceramic)
MTBF
10
Input standby current
V
(4)
0.6
Input low current (IIL)
II
3
2.8
µA
V/ms
(6)
560
(7)
µF
(8)
mΩ
15
106 Hr
See SOA temperature derating curves to identify maximum output current at higher ambient temperatures.
The minimum input voltage is 3 V or (VO + 1.1) V, whichever is greater. A 5-V input bus is recommended for output voltages higher than
2 V.
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1% with 100 ppm/°C or better temperature stability.
This control pin has an internal pullup to the input voltage VI. Do not tie the inhibit pin to VI or to another module's inhibit pin. If it is left
open circuit, the module operates when input power is applied. A small low-leakage (< 100 nA) MOSFET is recommended for control.
See the application section for further guidance.
An external 47-µF ceramic capacitor is required across the input (VI and GND) for proper operation. Locate the capacitor close to the
module.
An external output capacitor is not required for basic operation. Additional capacitance at the load improves the transient response.
This is the calculated maximum capacitance. The minimum ESR limitation often results in a lower value. See the capacitor application
information for further guidance.
This is the minimum ESR for all the electrolytic (nonceramic) capacitance. Use 7 mΩ as the minimum when calculating the total
equivalent series resistance (ESR) using the max-ESR values specified by the capacitor manufacturer.
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PIN ASSIGNMENT
1
2
3
6
PTH04000W
(Top View)
5
4
TERMINAL FUNCTIONS
TERMINAL
NAME
NO.
GND
I/O
This is the common ground connection for the VI and VO power connections. It is also the 0 Vdc
reference for the Inhibit , the VO Adjust, and the Track control inputs.
1
Track
2
DESCRIPTION
I
This is an analog control input that enables the output voltage to follow an external voltage. This pin
becomes active typically 20 ms after the input voltage has been applied, and allows direct control of the
output voltage from 0 V up to the nominal set-point voltage. Within this range the output voltage follows
the voltage at the Track pin on a volt-for-volt basis. When the control voltage is raised above this range,
the module regulates at its set-point voltage. The feature allows the output voltage to rise
simultaneously with other modules powered from the same input bus. If unused, this input should be
connected to VI.
NOTE: Due to the undervoltage lockout feature, the output of the module cannot follow its own input
voltage during power up. For more information, see the related application report (SLTA054).
VI
3
I
The positive input voltage power node to the module, which is referenced to common GND.
Inhibit
4
I
The Inhibit pin is an open-collector/drain-negative logic input that is referenced to GND. Applying a
low-level ground signal to this input disables the module's output. When the Inhibit control is active, the
input current drawn by the regulator is significantly reduced. If the Inhibit pin is left open-circuit, the
module produces an output voltage whenever a valid input source is applied.
VO Adjust
5
I
A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage of the
module higher than 0.9 V. If left open-circuit, the output voltage defaults to this value. The temperature
stability of the resistor should be 100 ppm/°C (or better). The set-point range is from 0.9 V to 3.6 V. The
electrical specification table gives the standard resistor value for a number of common output voltages.
See the application information for further guidance.
VO
6
O
The regulated positive power output with respect to the GND node.
4
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TYPICAL CHARACTERISTICS (5-V INPUT) (1) (2)
EFFICIENCY
vs
OUTPUT CURRENT
100
OUTPUT RIPPLE
vs
OUTPUT CURRENT
50
VO- Output Voltage Ripple - mVPP
VO = 2.5 V
VO = 3.3 V
Efficiency - %
90
80
VO = 1.8 V
70
VO = 1.5 V
VO = 1.2 V
VO = 1 V
60
50
0
0.5
1
1.5
2
2.5
40
30
VO = 1.5 V
20
VO = 3.3 V
10
0
3
0
0.5
(2)
2
2.5
Figure 2.
POWER DISSIPATION
vs
OUTPUT CURRENT
AMBIENT TEMPERATURE
vs
OUTPUT CURRENT
90
1
80
0.8
VO = 2.5 V
0.6
0.4
VO = 1 V
0.2
0
(1)
1.5
Figure 1.
1.2
0
1
0.5
1
1.5
2
3
IO - Output Current - A
TA - Ambient Temperature - oC
PD - Power Dissipation - W
IO - Output Current - A
2.5
3
Nat Conv
All VO
Airflow:
70
60
50
40
30
20
0
0.5
1
1.5
2
IO - Output Current - A
IO - Output Current - A
Figure 3.
Figure 4.
2.5
3
The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the
converter. Applies to Figure 1, Figure 2, and Figure 3.
The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum
operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 2 oz. copper.
Applies to Figure 4.
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TYPICAL CHARACTERISTICS (3.3-V INPUT) (1) (2)
EFFICIENCY
vs
OUTPUT CURRENT
OUTPUT RIPPLE
vs
OUTPUT CURRENT
100
50
VO = 2 V
VO = 1.8 V
VO = 1.5 V
Efficiency - %
90
VO- Output Voltage Ripple - mVPP
95
85
80
75
VO = 1.2 V
70
VO = 1 V
65
VO = 0.9 V
60
55
50
0
0.5
1
1.5
2
2.5
40
30
VO = 1.8 V
20
VO = 1.2 V
10
VO = 0.9 V
0
3
0
0.5
(2)
6
2
2.5
Figure 6.
POWER DISSIPATION
vs
OUTPUT CURRENT
AMBIENT TEMPERATURE
vs
OUTPUT CURRENT
90
1
80
0.8
0.6
VO = 1.8 V
0.4
VO = 0.9 V
0.2
0
(1)
1.5
Figure 5.
1.2
0
1
0.5
1
1.5
2
3
IO - Output Current - A
TA - Ambient Temperature - oC
PD - Power Dissipation - W
IO - Output Current - A
2.5
3
Nat Conv
All VO
Airflow:
70
60
50
40
30
20
0
0.5
1
1.5
2
IO - Output Current - A
IO - Output Current - A
Figure 7.
Figure 8.
2.5
3
The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the
converter. Applies to Figure 5, Figure 6, and Figure 7.
The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum
operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 2 oz. copper.
Applies to Figure 8.
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APPLICATION INFORMATION
Adjusting the Output Voltage of the PTH04000W Wide-Output Adjust Power Modules
The VO Adjust control (pin 5) sets the output voltage of the PTH04000W product. The adjustment range is from
0.9 V to 3.6 V. The adjustment method requires the addition of a single external resistor, RSET, that must be
connected directly between the VO Adjust and GND pin 1. Table 1 gives the standard external resistor for a
number of common bus voltages, along with the actual voltage the resistance produces.
For other output voltages, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of values given in Table 2. Figure 9 shows the placement of the required
resistor.
0.891 V
- 3.24 kW
RSET = 10 kW x
VO - 0.9 V
Table 1. Standard Values of Rset for Common Output
Voltages
VO
(Required)
(1)
RSET
(Standard Value)
VO
(Actual)
3.3 V
(1)
475 Ω
3.298 V
2.5 V
(1)
2.32 kΩ
2.502 V
2V
4.87 kΩ
1.999 V
1.8 V
6.65 kΩ
1.801 V
1.5 V
11.5 kΩ
1.504 V
1.2 V
26.1 kΩ
1.204 V
1V
84.5 kΩ
1.001 V
0.9 V
Open
0.9 V
The minimum input voltage is 3 V or (VO + 1.1) V, whichever is
greater.
2
Track
3
Inhibit
4
CI
47 µF
(Required)
VO
6
PTH04000W
VI
VO
VOAdj
GND
1
5
RSET
0.05 W
1%
+
VI
GND
CO
47 µF
(Optional)
GND
(1)
A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/°C (or
better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 5 and 1
using dedicated PCB traces.
(2)
Never connect capacitors from VO Adjust to either GND or VO. Any capacitance added to the VO Adjust pin affects the
stability of the regulator.
Figure 9. VO Adjust Resistor Placement
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Table 2. Calculated Set-Point Resistor Values
8
VO Required
RSET
VO Required
RSET
VO Required
RSET
0.900
Open
1.475
12.3 kΩ
2.55
2.16 kΩ
0.925
353 kΩ
1.50
11.6 kΩ
2.60
2.00 kΩ
0.950
175 kΩ
1.55
10.5 kΩ
2.65
1.85 kΩ
0.975
116 kΩ
1.60
9.49 kΩ
2.70
1.71 kΩ
1.000
85.9 kΩ
1.65
8.64 kΩ
2.75
1.58 kΩ
1.025
68.0 kΩ
1.70
7.90 kΩ
2.80
1.45 kΩ
1.050
56.2 kΩ
1.75
7.24 kΩ
2.85
1.33 kΩ
1.075
47.7 kΩ
1.80
6.66 kΩ
2.90
1.22 kΩ
1.100
41.3 kΩ
1.85
6.14 kΩ
2.95
1.11 kΩ
1.125
36.4 kΩ
1.90
5.67 kΩ
3.00
1.00 kΩ
1.150
32.4 kΩ
1.95
5.25 kΩ
3.05
904 Ω
1.175
29.2 kΩ
2.00
4.86 kΩ
3.10
810 Ω
1.200
26.5 kΩ
2.05
4.51 kΩ
3.15
720 Ω
1.225
24.2 kΩ
2.10
4.19 kΩ
3.20
634 Ω
1.250
22.2 kΩ
2.15
3.89 kΩ
3.25
551 Ω
1.275
20.5 kΩ
2.20
3.61 kΩ
3.30
473 Ω
1.300
19.0 kΩ
2.25
3.36 kΩ
3.35
397 Ω
1.325
17.7 kΩ
2.30
3.12 kΩ
3.40
324 Ω
1.350
16.6 kΩ
2.35
2.90 kΩ
3.45
254 Ω
1.375
15.5 kΩ
2.40
2.70 kΩ
3.50
187 Ω
1.400
14.6 kΩ
2.45
2.51 kΩ
3.55
122 Ω
1.425
13.7 kΩ
2.50
2.33 kΩ
3.60
60 Ω
1.450
13.0 kΩ
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CAPACITOR RECOMMENDATIONS for the PTH04000W WIDE-OUTPUT
ADJUST POWER MODULES
Input Capacitor
The minimum required input capacitor(s) is 47-µF of ceramic capacitance, in either an X5R or X7R temperature
tolerance. The ceramic capacitors should be located within 0.5 inch (1,27 cm) of the regulator's input pins.
Electrolytic capacitors can also be used at the input, but only in addition to the required ceramic capacitance.
The minimum ripple current rating for nonceramic capacitors should be at least 200 mA rms. The ripple current
rating of electrolytic capacitors is a major consideration when they are used at the input.
When specifying regular tantalum capacitors for use at the input, a minimum voltage rating of 2 × (maximum dc
voltage + ac ripple) is highly recommended. This is standard practice to ensure reliability. Polymer-tantalum
capacitors are not affected by this requirement.
For improved ripple reduction on the input bus, additional ceramic capacitors can be used to complement the
minimum requirement.
Output Capacitors (Optional)
For applications with load transients (sudden changes in load current), the regulator response benefits from
additional external output capacitance. The recommended output capacitance of 47 µF allows the module to
meet its transient response specification. A high-quality computer-grade electrolytic capacitor should be
adequate.
Electrolytic capacitors should be located close to the load circuit. These capacitors provide decoupling over the
frequency range, 2 kHz to 150 kHz. Aluminum electrolytic capacitors are suitable for ambient temperatures
above 0°C. For operation below 0°C, tantalum or OS-CON type capacitors are recommended. When using one
or more nonceramic capacitors, the calculated equivalent ESR should be no lower than 4 mΩ (7 mΩ using the
manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in
Table 3.
Ceramic Capacitors
Above 150 kHz the performance of aluminum electrolytic capacitors becomes less effective. To further improve
the reflected input ripple current, or the output transient response, multilayer ceramic capacitors must be added.
Ceramic capacitors have low ESR and their resonant frequency is higher than the bandwidth of the regulator.
When placed at the output, their combined ESR is not critical as long as the total value of ceramic capacitance
does not exceed 150 µF. Also, to prevent the formation of local resonances, do not exceed the maximum
number of capacitors specified in the capacitor table.
Tantalum Capacitors
Additional tantalum type capacitors can be used at both the input and output, and are recommended for
applications where the ambient operating temperature can be less than 0°C. The AVX TPS, Sprague
593D/594/595, and Kemet T495/T510/T520 capacitors series are suggested over many other tantalum types due
to their rated surge, power dissipation, and ripple current capability. As a caution, many general-purpose
tantalum capacitors have considerably higher ESR and lower ripple current capability. These capacitors are also
less reliable as they have lower power dissipation capability and surge current ratings. Tantalum capacitors that
do not have a stated ESR or surge current rating are not recommended for power applications. When specifying
OS-CON and polymer-tantalum capacitors for the output, the minimum ESR limit is encountered well before the
maximum capacitance value is reached.
Capacitor Table
The capacitor table, Table 3, identifies the characteristics of capacitors from a number of vendors with
acceptable ESR and ripple current (rms) ratings. The recommended number of capacitors required at both the
input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors
from other vendors are available with comparable specifications. Those listed are for guidance. The rms rating
and ESR (at 100 kHz) are critical parameters necessary to insure both optimum regulator performance and long
capacitor life.
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Designing for Load Transients
The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of 1 A/s.
The typical voltage deviation for this load transient is given in the data sheet specification table using the optional
value of output capacitance. As the di/dt of a transient is increased, the response of a converter's regulation
circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation with any dc/dc
converter once the speed of the transient exceeds its bandwidth capability. If the target application specifies a
higher di/dt or lower voltage deviation, the requirement can only be met with additional output capacitor
decoupling. In these cases, special attention must be paid to the type, value, and ESR of the capacitors selected.
If the transient performance requirements exceed those specified in the data sheet, the selection of output
capacitors becomes more important. Review the minimum ESR in the characteristic data sheet for details on the
capacitance maximum.
Table 3. Recommended Input/Output Capacitors
CAPACITOR CHARACTERISTICS
(1)
QUANTITY
WORKING
VOLTAGE
VALUE
(F)
EQUIVALENT
SERIES
RESISTANCE
(ESR)
85C
MAXIMUM
RIPPLE
CURRENT
(Irms)
Panasonic WA (SMT)
FC (SMT)
10 V
25 V
120
47
0.035 Ω
0.400 Ω
2800 mA
230 mA
8 × 6,9
8 × 6,2
1
1
≤ 4 (2)
1 (2)
Panasonic SL SP-cap(SMT)
6.3 V
6.3 V
47
56
0.018 Ω
0.009 Ω
2500 mA
3000 mA
7,3 ×4,3
7,3 × 4,3
1
1
≤2
≤1
EEFCD0J470R
EEFSL0J560R
United Chemi-con PXA (SMT)
FS
LXZ
MVZ (SMT)
10
10
16
16
V
V
V
V
47
100
100
100
0.031 Ω
0.040 Ω
0.250 Ω
0.440 Ω
2250 mA
2100 mA
290 mA
230 mA
6,3 × 5,7
6,3 × 9,8
6,3 × 11,5
6,3 × 5,7
1
1
1
1
1
≤3
1
1
PXA10VC470MF60TP
10FS100M
LXZ16VB101M6X11LL
MVZ16VC101MF60TP
Nichicon UWG (SMT)
F559(Tantalum)
PM
16 V
10 V
10 V
100
100
100
0.400 Ω
0.055 Ω
0.550 Ω
230 mA
2000 mA
210 mA
8 × 6,2
7,7 × 4,3
6 × 11
1
1
1
1
≤3
1
UWG1C101MCR1GS
F551A107MN
UPM1A101MEH
Sanyo Os-con\ POS-Cap SVP
(SMT)
SP
10 V
6.3 V
10 V
68
47
56
0.025 Ω
0.074 Ω
0.045 Ω
2400 mA
1110 mA
1710 mA
7,3 × 4,3
5×6
6,3 × 5
1
1
1
≤3
≤3
≤3
10TPE68M
6SVP47M
10SP56M
AVX Tantalum TPS (SMD)
10 V
10 V
47
47
0.100 Ω
0.060 Ω
1100 mA
> 412 mA
7,3L × 4,3W
× 4,1H
1
1
≤3
≤ 53
TPSD476M010R0100
TPSB476M010R0500
Kemet T520 (SMD)
AO-CAP
10 V
6.3 V
68
47
0.060 Ω
0.028 Ω
>1200 mA
>1100 mA
7,3L × 5,7W
× 4H
1
1
≤3
≤3
T520V686M010ASE060
A700V476M006AT
Vishay/Sprague 594D/595D
(SMD)
10 V
10 V
68
68
0.100 Ω
0.240 Ω
>1000 mA
680 mA
7,3L × 6W ×
4,1H
1
1
≤3
≤3
594D686X0010C2T
595D686X0010C2T
94SL
16 V
47
0.070 Ω
1550 mA
8×5
1
≤3
94SL476X0016EBP
TDK Ceramic X5R (Leaded)
10 V
47
0.005 Ω
>1400 mA
7,5L × 4,0W
× 8,0H
≥1
≤2
FK22X5R1A476M
CAPACITOR VENDOR/
COMPONENT
SERIES
PHYSICAL
SIZE
(mm)
INPUT
BUS (2)
OUTPUT
BUS
(4)
VENDOR
NUMBER
EEFWA1A121P (3)
EEVFC1E470P (3)
TDK Ceramic X5R
Murata Ceramic X5R
Kemet
6.3 V
6.3 V
6.3 V
22
22
22
0.002 Ω
0.002 Ω
0.002 Ω
>1400 mA
>1000 mA
>1000 mA
1210 case
3225 mm
≥2
≥ 2 (4)
≥ 2 (4)
≤3
≤3
≤3
C3225X5R0J226KT/MT
GRM32ER61J223M
C1210C226K9PAC
TDK Ceramic X5R
Murata Ceramic X5R
Kemet
6.3 V
6.3 V
6.3 V
47
47
47
0.002 Ω
0.002 Ω
0.002 Ω
>1400 mA
>1000 mA
>1000 mA
1210 case
3225 mm
≥1
≥1
≥1
≤2
≤2
≤2
C3225X5R0J476KT/MT
GRM32ER60J476M/6.3
C1210C476K9PAC
(1)
(2)
(3)
(4)
10
Check with capacitor manufacturers for availability and lead-free status.
A ceramic capacitor is required on the input. An electrolytic capacitor can be added to the output for improved transient response.
An optional through-hole capacitor available.
A total capacitance of 44 µF is an acceptable replacement for a single 47-µF capacitor.
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Product Folder Link(s): PTH04000W
PTH04000W
www.ti.com
SLTS247B – JUNE 2005 – REVISED OCTOBER 2007
Features of the PTH/PTV Family of Nonisolated, Wide-Output Adjust Power Modules
POLA™ Compatibility
The PTH/PTV family of nonisolated, wide-output adjustable power modules from Texas Instruments are
optimized for applications that require a flexible, high-performance module that is small in size. Each of these
products are POLA™ compatible. POLA-compatible products are produced by a number of manufacturers, and
offer customers advanced, nonisolated modules with the same footprint and form factor. POLA parts are also
ensured to be interoperable, thereby providing customers with true second-source availability.
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 should be directly connected to the input voltage, VI (see Figure 10).
5
2
Track
3
VO = 2.5 V
6
VI
VO
PTH04000W
Inhibit
CI
47 µF
(Required)
VO Adj
4
GND
1
+
VI = 5 V
2.33 kW
0.05 W, 1%
CO
47 µF
(Optional)
GND
GND
Figure 10. Power-Up Application Circuit
When the Track pin is connected to the input voltage, the Auto-Track function is permanently disengaged. This
allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is
under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate.
VI (1 V/div)
VO (1 V/div)
II (1 A/div)
t - Time = 10 ms/div
Figure 11. Power-Up Waveform
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SLTS247B – JUNE 2005 – REVISED OCTOBER 2007
From the moment a valid input voltage is applied, the soft-start control introduces a short time delay (typically
less than 5 ms) before allowing the output voltage to rise. The output then progressively rises to the module
set-point voltage. Figure 11 shows the soft-start power-up characteristic of the PTH04000W, operating from a
5-V input bus and configured for a 2.5-V output. The waveforms were measured with a 3-A resistive load and the
Auto-Track feature disabled. The initial rise in input current when the input voltage first starts to rise is the charge
current drawn by the input capacitors. Power up is complete within 25 ms.
Current Limit Protection
The PTH04000W modules protect against load faults with a continuous current limit characteristic. Under a load
fault condition, the output current cannot exceed the current limit value. Attempting to draw current that exceeds
the current limit value causes the output voltage to be progressively reduced. Current is continuously supplied to
the fault until it is removed. On removal of the fault, the output voltage promptly recovers.
Thermal Shutdown
Thermal shutdown protects the module internal circuitry against excessively high temperatures. A rise in
temperature may be the result of a drop in airflow, a high ambient temperature, or a sustained current limit
condition. If the junction temperature of the internal components exceeds 150C, the module shuts down. This
reduces the output voltage to zero. The module starts up automatically, by initiating a soft-start power up when
the sensed temperature decreases 10C below the thermal shutdown trip point.
Output On/Off Inhibit
For applications requiring output voltage on/off control, the PTH04000W power module incorporates an output
on/off Inhibit control (pin 4). The inhibit feature can be used wherever there is a requirement for the output
voltage from the regulator to be turned off.
The power module functions 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 12 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control
has its own internal pullup to VI potential. An open-collector or open-drain device is recommended to control this
input.
Turning Q1 on applies a low voltage to the Inhibit control pin and disables the output of the module. If Q1 is then
turned off, the module executes a soft-start power-up sequence. A regulated output voltage is produced within
20 ms. Figure 13 shows the typical rise in the output voltage, following the turn off of Q1. The turn off of Q1
corresponds to the rise in the waveform, V(INH). The waveforms were measured with a 2-A resistive load.
12
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SLTS247B – JUNE 2005 – REVISED OCTOBER 2007
2
5
VO Adj
Track
3
VI
Inhibit
4
C1
47 µF
(Required)
VO = 1.8 V
6
PTH04000W
VO
GND
1
+
VI = 5 V
RSET
6.65 kÙ
0.05 W, 1%
CO
47 µF
(Optional)
L
O
A
D
Inhibit
Q1
BSS138
GND
GND
Figure 12. On/Off Inhibit Control Circuit
VO (1 V/div)
II (500 mA/div)
V(INH) (10 V/div)
t - Time = 10 ms/div
Figure 13. Power Up Response From Inhibit Control
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SLTS247B – JUNE 2005 – REVISED OCTOBER 2007
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. The sequencing of two or more supply voltages during power up is a common
requirement for complex mixed-signal applications that use dual-voltage VLSI ICs such as the TMS320™ DSP
family, microprocessors, and ASICs.
How Auto-Track™ Works
Auto-Track works by forcing the module output voltage to follow a voltage presented at the Track control pin (1).
This control range is limited to between 0 V and the module set-point voltage. Once the track-pin voltage is
raised above the set-point voltage, the module output remains at its set-point (2). As an example, if the Track pin
of a 2.5-V regulator is at 1 V, the regulated output is 1 V. If the voltage at the Track pin rises to 3 V, the regulated
output does not go higher than 2.5 V.
Under Auto-Track control, the regulated output from the module follows the voltage at its Track pin on a
volt-for-volt basis. By connecting the Track pin of a number of these modules together, the output voltages follow
a common signal during power up and power down. The control signal can be an externally generated master
ramp waveform, or the output voltage from another power supply circuit (3). For convenience, the Track input
incorporates an internal RC-charge circuit. This operates off the module input voltage to produce a suitable rising
waveform at power up.
2
U1
5
VOAdj
Track
VO1 = 3.3 V
5V
3
6
Inhibit
4
C1
0V
VO
PTH04000W
VI
GND
1
C2
475 W
U3
TPS3808G50* 6
4
VCC
VOAdj
VO2 = 1.8 V
SENSE
MR
1
3
RESET
GND
C3
4700 pF
VI
PTH05050W
Inhibit
CT
2
+
3
5
2
Track
C4
0.1 µF
C5
VO
6
GND
4
+
5
U2
1
C6
5.49 kW
*Use TPS3808G33 with 3.3-V input modules.
Figure 14. Auto-Track Circuit
14
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V(TRK) (1 V/div)
V(TRK) (1 V/div)
VO1 (1 V/div)
VO1 (1 V/div)
VO2 (1 V/div)
VO2 (1 V/div)
t - Time = 10 ms/div
t - Time = 400 ms/div
Figure 15. Simultaneous Power-Up With
Auto-Track Control
Figure 16. Simultaneous Power-Down With
Auto-Track Control
Typical 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. This can be an open-collector (or open drain) device, such as a power-up reset voltage supervisor
IC. See U3 in Figure 14.
To coordinate a power-up sequence, the Track control must first be pulled to ground potential. This should be
done at or before input power is applied to the modules. The ground signal should be maintained for at least
20 ms after input power has been applied. This brief period gives the modules time to complete their internal
soft-start initialization (4), enabling them to produce an output voltage. A low-cost supply voltage supervisor IC,
that includes a built-in time delay, is an ideal component for automatically controlling the track inputs at power
up.
Figure 14 shows how the TPS3808G50 supply voltage supervisor IC (U3) can be used to coordinate the
sequenced power-up of two 5-V input Auto-Track modules. The output of the TPS3808G50 supervisor becomes
active above an input voltage of 0.8 V, enabling it to assert a ground signal to the common track control well
before the input voltage has reached the module's undervoltage lockout threshold. The ground signal is
maintained until approximately 27 ms after the input voltage has risen above U3's voltage threshold, which is
4.65 V. The 27-ms time period is controlled by the capacitor C3. The value of 4700 pF provides sufficient time
delay for the modules to complete their internal soft-start initialization. The output voltage of each module
remains at zero until the track control voltage is allowed to rise. When U3 removes the ground signal, the track
control voltage automatically rises. This causes the output voltage of each module to rise simultaneously with the
other modules, until each reaches its respective set-point voltage.
Figure 15 shows the output voltage waveforms from the circuit of Figure 14 after input voltage is applied to the
circuit. The waveforms, VO1 and VO2 represent the output voltages from the two power modules, U1 (3.3 V) and
U2 (1.8 V), respectively. VO1 and VO2 are shown rising together to produce the desired simultaneous power-up
characteristic.
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. See Figure 16. Power-down is normally complete before the input
voltage has fallen below the modules' undervoltage lockout. This is an important constraint. Once the modules
recognize that an input voltage is no longer present, their outputs can no longer follow the voltage applied at their
track input. During a power-down sequence, the fall in the output voltage from the modules is limited by the
Auto-Track slew rate capability.
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SLTS247B – JUNE 2005 – REVISED OCTOBER 2007
Notes on Use of Auto-Track™
1. The Auto-Track function tracks almost any voltage ramp during power up, and is compatible with ramp
speeds of up to 1 V/ms.
2. The Track pin voltage must be allowed to rise above the module set-point voltage before the module
regulates at its adjusted set-point voltage.
3. The absolute maximum voltage that may be applied to the Track pin is the input voltage VI.
4. The module cannot follow a voltage at its track control input until it has completed its soft-start initialization.
This takes about 20 ms from the time that a valid voltage has been applied to its input. During this period, it
is recommended that the Track pin be held at ground potential.
5. The Auto-Track function is disabled by connecting the Track pin to the input voltage (VI). When Auto-Track is
disabled, the output voltage rises at a quicker and more linear rate after input power has been applied.
16
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PACKAGE OPTION ADDENDUM
www.ti.com
15-Mar-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
(3)
Device Marking
(4/5)
(6)
PTH04000WAH
ACTIVE
ThroughHole Module
EUS
6
56
RoHS Exempt
& Green
SN
N / A for Pkg Type
-40 to 85
PTH04000WAS
ACTIVE
Surface
Mount Module
EUT
6
49
Non-RoHS
& Green
SNPB
Level-1-235C-UNLIM/
Level-3-260C-168HRS
-40 to 85
PTH04000WAST
ACTIVE
Surface
Mount Module
EUT
6
250
Non-RoHS
& Green
SNPB
Level-1-235C-UNLIM/
Level-3-260C-168HRS
-40 to 85
PTH04000WAZ
ACTIVE
Surface
Mount Module
EUT
6
49
RoHS (In
Work) & Green
SNAGCU
Level-3-260C-168 HR
-40 to 85
PTH04000WAZT
ACTIVE
Surface
Mount Module
EUT
6
250
RoHS (In
Work) & Green
SNAGCU
Level-3-260C-168 HR
-40 to 85
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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