TEXAS INSTRUMENTS SLTS206C Technical data

Auto-Track™

Sequencing

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PTH03020W —3.3-V Input

22-A, 3.3-V Input Non-Isolated
Wide-Output Adjust Power Module

NOMINAL SIZE = 1.5 in x 0.87 in

(38,1 mm x 22,1 mm)

Description

The PTH03020 series of non-isolated
power modules offers OEM designers a
combination of high performance, small
footprint, and industry leading features.
As part of a new class of power modules
these products provide designers with the
flexibility to power the most complex
multi-processor digital systems using
off-the-shelf catalog parts.

The series employs double-sided surface
mount construction and provides high­performance step-down power conversion
for up to 22 A of output current from a

3.3-V input bus voltage. The output volt­age of the PTH03020W can be set to
any value over the range, 0.8 V to 2.5 V,
using a single resistor.

SLTS206C – MAY 2003 – REVISED DECEMBER 2003

Features

• Up to 22-A Output Current

• 3.3-V Input Voltage

• Wide-Output Voltage Adjust

(0.8 V to 2.5 V)

• Efficiencies up to 93 %

• 120 W/in³ Power Density

• On/Off Inhibit

• Output Voltage Sense

• Pre-Bias Startup

• Margin Up/Down Controls

• Under-Voltage Lockout

This series includes Auto-Track™.

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, output voltage adjust (trim),
and margin up/down controls. To ensure
tight load regulation, an output voltage
sense is also provided. A non-latching
over-current trip and over-tempterature
shutdown provide 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

• Output Over-Current Protection

• Over-Temperature Protection

• Operating Temp: –40 to +85 °C

• IPC Lead Free 2

• Safety Agency Approvals:

• Point-of-load Alliance (POLA)

(Non-Latching, Auto-Reset)

UL 1950, CSA 22.2 950, EN60950
VDE (Pending)

Compatible

Pin Configuration

Pin Function

1 GND
2V

in

3 Inhibit *
4Vo Adjust
5Vo Sense
6V

out

7 GND
8 Track
9 Margin Down *
10 Margin Up *

* Denotes negative logic:

Open = Normal operation
Ground = Function active

Standard Application

Track

Margin Down

Margin Up

V

IN

Inhibit

GND

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1

2

+

C

IN

1,000 µF
(Required)

10 9 8

PTH03020W

(Top View)

R

0.1 W, 1 %

543

(Required)

SET

R

= Required to set the output voltage to a value

set

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

Cin= Required electrolytic 1,000 µF
C

= Recommended 330 µF electrolytic

out

7

V

Vo Sense

C

OUT

330 µF
(Optional)

GND

OUT

L
O
A
D

6

+

PTH03020W —3.3-V Input

22-A, 3.3-V Input Non-Isolated
Wide-Output Adjust Power Module

Ordering Information

Output Voltage

Code Voltage

W 0.8 V – 2.5 V (Adjust)

Notes: (1) Add “T” to end of part number for tape and reel on SMD packages only.

(2) Reference the applicable package reference drawing for the dimensions and PC board layout
(3) “Standard” option specifies 63/37, Sn/Pb pin solder material.

(PTH03020Hxx)

Package Options

Code Description Pkg Ref.

AH Horiz. T/H (EUK)
AS SMD, Standard

(PTH03020xHH)

Pin Descriptions

Vin: The positive input voltage power node to the mod-

ule, which is referenced to common GND.

Vout: The regulated positive power output with respect
to the GND node.

GND: This is the common ground connection for the
Vin and Vout power connections. It is also the 0 VDC
reference for the control inputs.

Inhibit: The Inhibit pin is an open-collector/drain negative
logic input that is referenced to GND. Applying a low­level ground signal to this input disables the module’s
output and turns off the output voltage. 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 will produce an output when­ever a valid input source is applied.

Vo Adjust: A 0.1 W, 1 % tolerance (or better) resistor
must be connected between this pin and the GND pin to
set the output voltage to the desired value. The set point
range for the output voltage is from 0.8 V to 2.5 V. The
resistor required for a given output voltage may be cal­culated from the following formula. If left open circuit,
the module output will default to its lowest output voltage
value. For further information on the adjustment of the
output voltage consult the related application note.

R

set

= 10 k ·

The specification table gives the preferred resistor values
for a number of standard output voltages.

0.8 V

V

– 0.8 V

out

– 2.49 k

SLTS206C – MAY 2003 – REVISED DECEMBER 2003

(1)

(2)

(3)

(EUL)

Vo Sense: The sense input allows the regulation circuit to
compensate for voltage drop between the module and
the load. For optimal voltage accuracy Vo Sense should
be connected to Vout. It can also be left disconnected.

Track: 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 will follow 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, the input should
be connected to V

. Note: Due to the under-voltage lockout

in

feature, the output of the module cannot follow its own input
voltage during power up. For more information, consult the
related application note.

Margin Down: When this input is asserted to GND, the
output voltage is decreased by 5% from the nominal. The
input requires an open-collector (open-drain) interface.
It is not TTL compatible. A lower percent change can
be accomodated with a series resistor. If unused, this
input may be left unconnected. For further informa­tion, consult the related application note.

Margin Up: When this input is asserted to GND, the
output voltage is increased by 5%. The input requires an
open-collector (open-drain) interface. It is not TTL
compatible. The percent change can be reduced with a
series resistor. If ununsed, this input may be left un­connected. For further information, consult the related
application note.

For technical support and further information, visit http://power.ti.com

PTH03020W —3.3-V Input

22-A, 3.3-V Input Non-Isolated
Wide-Output Adjust Power Module

SLTS206C – MAY 2003 – REVISED DECEMBER 2003

Environmental & Absolute Maximum Ratings (Voltages are with respect to GND)

Characteristics Symbols Conditions Min Typ Max Units

Track Input Voltage V
Operating Temperature Range T
Solder Reflow Temperature T
Storage Temperature T
Mechanical Shock Per Mil-STD-883D, Method 2002.3

Mechanical Vibration Mil-STD-883D, Method 2007.2 Suffix H — 20 —

track

a

reflow

s

Over Vin Range –40 — 85 °C
Surface temperature of module body or pins 235
— –40 — 125 °C

1 msec, ½ Sine, mounted

20-2000 Hz Suffix S — 10 —
Weight — — 5 — grams
Flammability — Meets UL 94V-O

Notes: (i) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.

Specifications (Unless otherwise stated, T

=25 °C, Vin =3.3 V, V

a

=2 V, Cin =1,000 µF, C

out

=0 µF, and Io =Iomax)

out

Characteristics Symbols Conditions Min Typ Max Units

Output Current I

Input Voltage Range V

o

in

60 °C, 200 LFM airflow 0 — 22

25 °C, natural convection 0 — 22

Over Io range 2.95
Set-Point Voltage Tolerance Vo tol — — ±2
Temperature Variation ∆Reg
Line Regulation ∆Reg
Load Regulation ∆Reg
Total Output Variation ∆Reg

temp

line

load

tot

Efficiency η I

Vo Ripple (pk-pk) V

r

–40 °C <Ta < +85 °C — ±0.5 — %V

Over Vin range — ±5 — mV

Over Io range — ±5 — mV

Includes set-point, line, load,

–40 °C ≤ Ta ≤ +85 °C

=10 A R

o

= 2.21 kΩ Vo = 2.5 V — 95 —

SET

= 4.12 kΩ Vo = 2.0 V — 94 —

R

SET

= 5.49 kΩ Vo = 1.8 V — 93 — %

R

SET

= 8.87 kΩ Vo = 1.5 V — 91 —

R

SET

= 17.4 kΩ Vo = 1.2 V — 90 —

R

SET

R

= 36.5 kΩ Vo = 1.0 V — 88 —

SET

20 MHz bandwidth — 20 — mVpp
Over-Current Threshold Io trip Reset, followed by auto-recovery — 41 — A
Transient Response 1 A/µs load step, 50 to 100 % Iomax,

t

tr

∆V

tr

C

out

=330 µF

Recovery Time — 50 — µSec

Vo over/undershoot — 100 — mV
Margin Up/Down Adjust Vo adj — ± 5 — %
Margin Input Current (pins 9 /10) IIL margin Pin to GND — – 8
Track Input Current (pin 8) IIL track Pin to GND — — –130
Track Slew Rate Capability dV
Under-Voltage Lockout UVLO Vin increasing — 2.8 2.95

Inhibit Control (pin3) Referenced to GND
Input High Voltage V

Input Low Voltage
Input Low Current

V
I

IL

IH
IL

inhibit

/dt C

track

≤ C

(max) — — 1 V/ms

out

out

Vin decreasing 2.2 2.7 —

Pin to GND — –130 — µA
Input Standby Current Iin inh Inhibit (pin 3) to GND, Track (pin 8) open — 10 — mA
Switching Frequency ƒ
External Input Capacitance C
External Output Capacitance C

s

in

out

Over Vin and Io ranges 250 300 340 kHz

Capacitance value non-ceramic 0 330 (7)11,000

ceramic 0 — 300

Equiv. series resistance (non-ceramic) 4
Reliability MTBF Per Bellcore TR-332

Notes:

(1) See SOA curves or consult factory for appropriate derating.
(2) The minimum input voltage is equal to 2.95 V or Vout + 0.5 V, whichever is greater.
(3) The set-point voltage tolerance is affected by the tolerance and stability of R

with 100 ppm/°C or better temperature stability.
(4) A small low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc.
(5) This control pin has an internal pull-up to the input voltage Vin. If it is left open-circuit the module will operate when input power is applied. A small

low-leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related application note.
(6) A 1,000 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 700 mArms of ripple current.
(7) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response.
(8) This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the application notes for further guidance.
(9) This is the typcial ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m

50 % stress, Ta =40 °C, ground benign

. The stated limit is unconditionally met if R

SET

Ω

as the minimum when using max-ESR values to calculate.

–0.3 — Vin + 0.3 V

(i)

— 500 — G’s

PTH03020W

(1)
(1)

(2)

— 3.65 V

——±3

(4)

Vin –0.5 — Open
–0.2 — 0.8

(6)

1,000

(9)

——µF

——mΩ

(3)

(3)

—µA

(5)

(5)

(8)

4.9 — — 10

has a tolerance of 1 %

SET

°C

G’s

A

%V

%V

µA

V

V

µF

6

o

o

o

Hrs

For technical support and further information, visit http://power.ti.com

PTH03020W —3.3-V Input

)

)

)

)

22-A, 3.3-V Input Non-Isolated
Wide-Output Adjust Power Module

Characteristic Data; Vin =3.3V (See Note A)

Efficiency vs Load Current

100

90

80

70

Efficiency - %

60

50

0 4 8 12 16 20

Output Ripple vs Load Current

50

40

30

20

Ripple - mV

10

Iout - (A

SLTS206C – MAY 2003 – REVISED DECEMBER 2003

Safe Operating Area; Vin =3.3 V (See Note B)

All Output Voltages

90

V

OUT

2.5V

1.8V

1.5V

1.2V

1.0V

V

OUT

1.5V

1.8V

1.2V

1.0V

2.5V

80

70

60

50

40

Ambient Temperature (°C)

30

20

0 5 10 15 20

Iout (A

Airflow

400LFM
200LFM
100LFM
Nat Conv

0

0 4 8 121620

Power Dissipation vs Load Current

8

6

4

Power Dissipation - W

2

0

0 4 8 12 16 20

Iout - (A

Iout - (A

Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the converter.
Note B: SOA 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 4 in.

×

4 in. double-sided PCB with 1 oz. copper.

For technical support and further information, visit http://power.ti.com

Application Notes

PTH03020W & PTH05020W

Capacitor Recommendations for the PTH03020 &

PTH05020 Series of Power Modules

Input Capacitor

The recommended input capacitor(s) is determined by
the 1,000 µF
minimum ripple current rating.

Ripple current and <100 mΩ equivalent series resistance

(ESR) values are the major considerations, along with
temperature, when designing with different types of
capacitors. Unlike polymer tantalum, conventional tan­talum capacitors have a recommended minimum voltage

rating of 2 × (maximum DC voltage + AC ripple). This

is standard practice to insure reliability.

For improved ripple reduction on the input bus, ceramic
capacitors may be substituted for electrolytic types using
the minimum required capacitance.

Output Capacitors (Optional)

For applications with load transients (sudden changes in
load current), regulator response will benefit from an
external output capacitance. The recommended output
capacitance of 330 µF will allow the module to meet
its transient response specification (see product data sheet).
For most applications, a high quality computer-grade
aluminum electrolytic capacitor is most suitable. These
capacitors provide adequate decoupling over the frequency
range, 2 kHz to 150 kHz, and are suitable when ambient
temperatures are above 0 °C. For operation below 0 °C,
tantalum, ceramic or Os-Con type capacitors are recom­mended. When using one or more non-ceramic 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 2-1.

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 can also be added.
Ceramic capacitors have very low ESR and their resonant
frequency is higher than the bandwidth of the regulator.
When used on the output their combined ESR is not
critical as long as the total value of ceramic capacitance
does not exceed 300 µF. Also, to prevent the formation of
local resonances, do not place more than five identical ce­ramic capacitors in parallel with values of 10 µF or greater.

Tantalum Capacitors

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 capacitor series are suggested over many other
tantalum types due to their higher rated surge, power

(1)

minimum capacitance and 700 mArms

dissipation, and ripple current capability. As a caution
many general purpose tantalum capacitors have consider­ably higher ESR, reduced power dissipation and lower
ripple current capability. These capacitors are also less
reliable when determining their power dissipation and
surge current capability. 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 will be encoun­tered well before the maximum capacitance value is
reached.

Capacitor Table

Table 2-1 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 ripple current rating and
ESR (at 100kHz) are critical parameters necessary to insure
both optimum regulator performance and long capacitor life.

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. 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 that
specified in the data sheet, or the total amount of load
capacitance is above 3,000 µF, the selection of output
capacitors becomes more important. For further guidance
consult the separate application note, “Selecting Output

Capacitors for PTH Products in High-Performance Applica­tions.”

For technical support and further information, visit http://power.ti.com

Application Notes

continued

PTH03020W & PTH05020W

Table 2-1: Input/Output Capacitors

)elytS(seireS

)laidaR(CF

KF)DMS(

detinU:noc-imehC

,nocihciN:munimulA

)laidaR(DH

)laidaR(MP

:noc-sO,oynaS

)laidaR(PS

)DMS(PVS

)DMS(AW

)DMS(ES/S

:mulatnaT,XVA

)DMS(SPTV01

:)DMS(temeK

eugarpS-yahsiV

cimareC,KDTR5X)DMS(V3.6

epyT,rodneVroticapaC

:munimulA,cinosanaP

)DMS(munimulA-yloP,AXP

)laidaR(noc-sO,XF

)laidaR(munimulA,ZXL

:munimulA-yloP,cinosanaP

tnaT-yloP,025T

cinagrO/tnaT-yloP,035T

)DMS(mulatnaT,D595

)laidaR(noc-sO,AS49

)DMS(R5XcimareC,temeKV61

cimareC,ataruMR5X)DMS(V3.6

scitsiretcarahCroticapaCytitnauQ

gnikroW

egatloV

V01
V01
V52
V01

V3.6

V3.6
V01
V01

V3.6
V01

V01
V01

V01

V3.6

V01

V01
V01

V3.6

V01
V61

V3.6

V3.6
V61
V61

V3.6
V61
V61

065

0001
0001
0001

074

0001

086

0001

0001
0001

074
065

074
081

074
074

033
033
074

074

0001

01
74

001
74
22
01

001
74
22
01

)Fµ(eulaVRSE.xaM

zHk001ta

090.0 Ω

860.0 Ω

0600 Ω

080.0 Ω

020.0 Ω

310.0 Ω

090.0 Ω

860.0 Ω

350.0 Ω

560.0 Ω

510.0 Ω

310.0 Ω

710.0 Ω

500.0 Ω

540.0 Ω

060.0 Ω

040.0 Ω

510.0 Ω

210.0 Ω

001.0 Ω

510.0 Ω

200.0 Ω

200.0 Ω

200.0 Ω —esac0121

200.0 Ω —esac0121

mumixaMC°501

elppiR

)smrI(tnerruC

Am557

Am0501
Am0011

Am058

Am0314
Am5394

Am067

Am0501

Am0301
Am0601

Am0054>
Am0025>

Am0054
Am0004

Am3271
Am6281

Am0081

Am0083>

Am0024

Am0441
Am0479

—esac0121

01 × 5.21

01 × 61

5.21 × 5.31

01 × 2.01

01 × 7.7
01 × 5.01
01 × 5.21

01 × 61

01 × 5.21

61 × 51

01 × 5.01
01 × 7.21

01 × 2.01

3.7 × 3.4 × 2.4

× W7.5 × H1.4

× L3.7
× H0.4

L2.7 × W6

× H1.4

61 × 52

eziSlacisyhP

)mm(

L3.7

W3.4

mm5223

mm5223

tupnI

suB

2
1
1
1

2
1
2
1

1
1

2
2

2

6

2

2

3
3

2

2
1

1

mm5223

1

1
1
1

1
1
1

tuptuO

suB

1
1
1
1

)1(

≤3
≤2

1
1

1
1

)1(

≤3
≤2

)1(

≤3
≤1

)1(

≤5

)1(

≤5

≤5
≤3

)1(

≤2

)1(

≤5
≤3

≤5
≤5

3≤
≤5
≤5
≤5

3≤
≤5
≤5
≤5

165A1CFUEE
201A1CFUEE

Q201E1KFVEE
P201A1KFVEE

M0001XF6

RPM201J0DHU

M074PS01

M065PVS01

P174A1AWFEE

R181J0ESFEE

rebmuNtraProdneV

PT08JM174CV3.6AXP

LL21X01M186BV01ZXL
LL61X01M201BV01ZXL

6HPM201A1MPU

5400R010M774ESPT
0600R010M774VSPT

SA010M733X025T
SA010M733X035T
SA600M774X035T

T2R0100X774D595

PBH6100X801AS49

CAP4M601C0121C

CAP9K674C0121C

M701J06RE23MRG
M674J06RE23MRG

K622C16RE23MRG

K601C16RD23MRG

TM701J0R5X5223C
TM674J0R5X5223C

TM622C1R5X5223C
TM601C1R5X5223C

(1) Total capacitance of 940 µF is acceptable based on the combined ripple current rating.

For technical support and further information, visit http://power.ti.com