TEXAS INSTRUMENTS SLTS220 Technical data
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PT6510 Series
8-A 5-V/3.3-V Input Adjustable ISR
with Short-Circuit protection
Description
The PT6510 series of power modules
is the recommended direct replacement
for the PT6500 series in existing designs.
The modules have the same output current rating as the PT6500 series (8 A)
and were designed to be functionally identical in as many aspects as possible. This
includes the input voltage range, on/off
standby control, and output voltage adjustment.
When used as a replacement, a PT6510
series part exhibits a number of performance enhancements over its PT6500
series equivalent. These include improved
power dissipation and efficiency, significantly reduced inrush current, and better
line and load regulation.
The modules are housed in the same
14-Pin SIP (Single In-line Package), and
include the same package options.
Features
• 8-A Rated Output Current
• Replaces PT6500 Series
• High Efficiency (91% for PT6511)
• Small Footprint (0.75 in², Suffix ‘N’)
• Output On/Off Standby Control
• Output Short-Circuit Protection
• Over-Temperature Protection
• Adjustable Output Voltage
• Soft Startup
• 16-pin Mount Option (Suffixes L & F)
Ordering Information
PT6511¨ = 3.3 Volts
† PT6512¨ = 1.5 Volts
PT6513¨ = 2.5 Volts
PT6514¨ = 3.6 Volts
† PT6515¨ = 1.2 Volts
† PT6516¨ = 1.8 Volts
† 3.3V Input Bus Capable
PT Series Suffix
Case/Pin Order Package
Configuration Suffix Code *
Vertical N (EED)
Horizontal A (EEA)
SMD C (EEC)
Horizontal, Top Tab H (EEH)
SMD, 2-Pin Tab L (EEL)
SMD, 2-Pin Ext Tab F (EEF)
Vertical, Side Tab R (EEE)
Horizontal, Side Tab G (EEG)
SMD, Side Tab B (EEK)
* Previously known as package styles 400/410.
(Package availability varies with output voltage option.
Reference the applicable package code drawing for the
dimensions and PC board layout)
(PT1234x)
SLTS220 FEBRUARY 2004
Pin-Out Information
Pin Function
1Vo Sense
2 Do Not Connect
3 STBY*
4V
in
5V
in
6V
in
7 GND
8 GND
9 GND
10 GND
11 V
out
12 V
out
13 V
out
14 V
* For further information, see
application notes.
out
Adjust
Standard Application
VoADJ
V
IN
C
COM
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4,5,6
+
IN
14
PT6510
7–10
3
SENSE
V
o
1
V
11,12,13
C
OUT
OUT
+
COM
L
O
A
D
Cin= Required 330 µF electrolytic capacitor.
C
= Required 330 µF electrolytic capacitor.
out
PT6510 Series
8-A 5-V/3.3-V Input Adjustable ISR
with Short-Circuit protection
Specifications (Unless otherwise stated, T
=25 °C, Vin =5 V, Cin =330 µF, C
a
=330 µF, and Io =Iomax)
out
SLTS220 FEBRUARY 2004
PT6510 SERIES
Characteristic Symbol Conditions Min Typ Max Units
Output Current I
Input Voltage Range V
o
in
Over Vin range 0.1
Over Io Range V
≥ 2.5 V 4.5
o
≤ 1.8 V 3.1
V
o
Vo = 3.6 V 4.8
(1)
—8 A
(2)
—6
(2)
— 6 VDC
(2)
—6
Output Voltage Tolerance Vo tol Ta = –40 to +85 °C Vo – 0.1 — Vo + 0. 1 V
Line Regulation Reg
Load Regulation Reg
line
load
Efficiency η I
Vo Ripple (pk-pk) V
r
Over Vin range ±2 — ±10 mV
Over Io range ±2 — ±10 mV
=3 A Vo =3.3 V — 92 —
o
=8 A Vo =3.3 V — 91 —
I
o
Vo =2.5 V — 89 —
=1.8 V — 83 — %
V
o
=1.5 V — 80 —
V
o
Vo =1.2 V — 75 —
=2.5 V — 87 —
V
o
Vo =1.8 V — 81 — %
=1.5 V — 77 —
V
o
Vo =1.2 V — 72 —
20 MHz bandwidth — 15 — mV
Over-Current Threshold Io trip Reset, followed by auto-recovery — 15 — A
Transient Response t
Switching Frequency ƒ
On/Off Standby (Pin 3) Referenced to –Vin (pin 7)
Input High Voltage V
Input Low Voltage V
Input Low Current I
∆V
tr
tr
s
IH
IL
IL
1 A/µs load step, 50 % to 100 % Iomax — 100 — µs
Vo over/undershoot — ±150 — mV
Over Vin and Io range 475 550 725 kHz
— — Open
–0.1 — +0.4
(3)
— –0.5 – mA
Standby Input Current Iin stby Pins 3 & 7 connected — 1 5 mA
External Output Capacitance C
External Input Capacitance C
Operating Temperature Range T
Storage Temperature T
out
in
a
s
Reliability MTBF Per Bellcore TR-332
Mechanical Shock — Per Mil-Std-883D, method 2002.3,
Mechanical Vibration — Per Mil-Std-883D, method 2007.2,
Weight — Suffixes N, A, & C — 12.5 —
See application schematic 330 — 5,000
See application schematic 330
(5)
——µF
Over Vin range –40 — +85
— –40 — +125 °C
50 % stress, Ta =40 °C, ground benign
1 ms, half-sine, mounted to a fixture
20-2000 Hz
Suffixes R, G & B — 16.5 —
Suffix H — 18.5 — grams
Suffix L — 15.5 —
Suffix F — 22 —
6.4 — — 10
— 500 — G’s
—10—G’s
(4)
(6)
Flammability — Materials meet UL 94V-0
Notes: (1) The ISR will operate at no load with reduced specifications.
(2) The minimum input voltage required by the part is V
(3) The STBY* control (pin 3) has an internal pull-up and if it is left open circuit the module will operate when input power is applied. The open-circuit
voltage is the input voltage, Vin. Refer to the application notes for other interface considerations.
(4) The module requires a 330 µF output capacitor for proper operation in all applications. For transient or dynamic load applications, additional output
capacitance (Cout) may be necessary. The maximum allowable output capacitance is 5,000 µF.
(5) In addition, the input capacitance (C
application note on capacitor recommendations.
(6) See Safe Operating Area curves or contact the factory for the appropriate derating.
) must be rated for a minimum of 1.2 Arms ripple current rating. For more information consult the related
in
+ 1.2 V, or 3.1 V, whichever is greater.
out
(7) The tab pins on the 16-pin mount package types (suffix L) must be soldered. For more information see the applicable package outline drawing.
pp
V
µF
°C
6
Hrs
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PT6510 Series
)
)
)
)
)
)
Typical Characteristics
8-A 5-V/3.3-V Input Adjustable ISR
with Short-Circuit protection
Characteristic Data; Vin =5 V (See Note A) Characteristic Data; Vin =3.3 V (See Note A)
Efficiency vs Output Current Efficiency vs Output Current
100
90
80
70
Efficiency - (%)
60
50
02468
Output Ripple vs Output Current
40
30
20
Ripple Voltage - (mV)
10
I
- (A
OUT
V
OUT
3.6 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
V
OUT
1.8 V
2.5 V
3.3 V
1.5 V
3.6 V
1.2 V
100
90
80
70
Efficiency - (%)
60
50
02468
Output Ripple vs Output Current
40
30
20
Ripple Voltage - (mV)
10
I
- (A
OUT
SLTS220 FEBRUARY 2004
V
OUT
2.5 V
1.8 V
1.5 V
1.2 V
V
OUT
1.8 V
1.5 V
1.2 V
2.5 V
0
02468
Power Dissipation vs Output Current Power Dissipation Output Current
4
3
2
1
Power Dissipation - (W)
0
02468
I
- (A
OUT
V
OUT
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
3.6 V
I
- (A
OUT
0
02468
4
3
2
1
Power Dissipation - (W)
0
02468
I
- (A
OUT
I
- (A
OUT
V
OUT
1.2 V
1.5 V
1.8 V
2.5 V
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
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)
)
)
PT6510 Series
Typical Characteristics
8-A 5-V/3.3-V Input Adjustable ISR
with Short-Circuit protection
in
PT6511; V
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
012345678
PT6515; V
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
012345678
= 3.3 V PT6515; V
OUT
I
(A
OUT
= 1.2 V
OUT
I
(A
OUT
=5 V (See Note B)
Airflow
200LFM
120LFM
60LFM
Nat Conv
Airflow
200LFM
120LFM
60LFM
Nat Conv
Safe Operating Area; 3.3 V (See Note B) Safe Operating Area; V
=1.2 V
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
012345678
OUT
I
(A
OUT
SLTS220 FEBRUARY 2004
Airflow
200LFM
120LFM
60LFM
Nat Conv
Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures
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Application Notes
PT6510 Series
Using the PT6510 Series as a Replacement for the
PT6500 Series in Existing Designs
Scope
The PT6510 series of power modules is the recommended
plug-in replacement for PT6500 series parts. The PT6510
series uses the same single-in-line package (SIP) outlines
and footprint as the PT6500 series, and was designed to be
functionally identical to the PT6500. This application
note highlights the differences in electrical performance
between a PT6510 series replacement compared to an
original PT6500 series part.
Overview
The features that the PT6510 series share with the
PT6500 series includes the output current rating, thermal
shutdown, and on/off standby. The input voltage range,
output voltage adjustment, and output voltage options
are also the same. In addition, applications that use the
PT6510 series as a replacement will experience a number
of performance enhancements. These include improved
efficiency and power dissipation, lower in-rush current
and output ripple voltage. The ‘off’ standby current is
also significantly reduced. Table 1-1 provides a cross
reference between the current PT6500 series part numbers and their equivalent PT6510 series part.
Table 1-1; PT6500 / PT6510 Series Equivalent Parts
PT6500 Series V
OUT
PT6510 Series
PT6501 3.3 V PT6511
PT6502 1.5 V PT6512
PT6503 2.5 V PT6513
PT6504 3.6 V PT6514
PT6505 1.2 V PT6515
PT6506 1.8 V PT6516
Electrical and Functional Differences
Although the PT6510 series was designed as a drop-in
replacement for PT6500 series, there are minor differences
in the electrical characteristics. These are described in the
following text and should be used to assess the replacement part’s compatibility with the system or end product.
A replacement part’s compatibility with the system can
be further verified with appropriate board-level tests.
On/Off Standby: The Standby input of the PT6510 series
is compatible with both the logic polarity and thresholds
of PT6500 series. One exception is the internal pull-up
voltage, which is slightly higher on the PT6510 parts.
The open-circuit voltage for the PT6510 series is the
input voltage, Vin, versus about 1 V for the PT6500 series.
This should not be a problem if the standby input is
controlled with an open-drain transistor with a sufficient
max-Vds rating.
Over-Current & Over-Temperature Protection:
To protect against short circuits and load impedance
faults, the PT6500 employs a constant output current
limit combined with over-temperature shutdown. The
PT6500 will feed a limited steady-state current into a
load fault. When limiting output current, the PT6500
exhibits higher power dissipation, which increases the
module's operating temperature. When its internal temperature rises above the over-temperature threshold, the
module will shut itself down for a few seconds. The
module will then continue to periodically shut down until
the load fault is removed.
The over-current protection mechanism of the PT6510
series is different. If the output current increases above
the modules over-current threshold, its output voltage
is momentarily turned off. It then attempts to recover
by executing a soft-start power up. The module will
continue in a rapid succession of shutdowns and restarts
until the load fault is removed. During this period the
output current is not steady state, but a series of short
high-amplitude pulses (frequency <100 Hz). However,
when operating into a short-circuit load fault, the average
output current and power dissipation are significantly
lower than under normal operation.
Power-Up Characteristic: Following the application of a
valid input source, the PT6510 series modules exhibit a
slightly longer time delay than the equivalent PT6500
series part. The PT6510 series has a soft-start power-up
feature, which lowers the in-rush current at its input.
Figure 1-1 and Figure 1-2 show the power-up characteristics of the PT6501 and PT6511 respectively. Both
modules have a 3.3-V regulated output, and rise to their
regulated output voltage in a similar period. Note that
the output voltage of the PT6501 begins to rise when
the input voltage reaches 2.2 V, whereas the output voltage
of the PT6511 doesn’t begin to rise until the input voltage
has reached 3.5 V.
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Application Notes
continued
PT6510 Series
Figure 1-1 PT6501 Power-Up Characteristics
HORIZ SCALE: 5 ms/Div
Vin (1 V/Div)
Vout (1 V/Div)
Figure 1-2; PT6511 Power-Up Characterstic
Vin (1 V/Div)
Vo (1 V/Div)
HORIZ SCALE: 5 ms/Div
Conclusion
The differences in electrical performance between the
PT6500 series and the PT6510 series are small. This
should result in only a few, if any, compatibility issues
when a PT6510 series part is used to replace a PT6500
series part in an existing application. In most cases, the
use of a PT6510 part will improve the performance of
the end product over the original PT6500. The performance differences are described to help customers work
through any compatibility issues, and thereby minimize
the impact to their end products. For additional information and questions call Texas Instrument's product
information center (PIC) and request application assistance for plug-in power products.
For technical support and further information, visit http://power.ti.com
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