TEXAS INSTRUMENTS SLTS179A Technical data
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PT6360 Series
11 A 12-V Input Adjustable
Integrated Switching Regulator
Features
• 12 V Input
• 11 A Output Current
• DSP Compatible
• >90 % Efficiency
• Adjustable Output Voltage
• On/Off Inhibit Function
• Over-Current Protection
Description
The PT6360 Excalibur™ series of integrated
switching regulators (ISRs) combines outstanding power density with a comprehensive list of
features. They are an ideal choice for applications
where board space is a premium and performance
cannot be compromised. These modules provide up
to 11 A of output current, yet are housed in a lowprofile, 12-pin, package that is almost half the
size of the previous product generation. The integral copper case construction requires no heatsink,
and offers the advantages of solderability and a
small footprint (0.64 in² for suffix ‘N’). Both
through-hole and surface mount pin configurations are available.
The PT6360 series operates from a 12-V input
bus and provides a convenient point-of-load power
source for the industry’s latest high-performance
DSPs and microprocessors. The series includes
output voltage options as low as 1.0 VDC.
Other features include external output voltage
adjustment, on/off inhibit, short circuit protection,
and an output remote sense.
SLTS179A - JANUARY 2003 - REVISED APRIL 2003
• Output Remote Sense
• Low-Profile (8 mm)
• Small Footprint
• Surface Mountable
• IPC Lead Free 2
Ordering Information
PT6361H = 5.0 Volts
PT6362H = 3.3 Volts
PT6363H = 2.5 Volts
PT6364H = 1.8 Volts
PT6365H = 1.5 Volts
PT6366H = 1.2 Volts
PT6367H = 1.0 Volts
PT Series Suffix
Case/Pin Order Package
Configuration Suffix Code
Vertical N (EPH)
Horizontal A (EPJ)
SMD C (EPK)
(Reference the applicable package code drawing for the dimensions and PC board layout)
(PT1234x)
(0.64 in², Suffix ‘N’)
Pin-Out Information
Pin Function
1 Inhibit*
2V
in
3V
in
4V
in
5 GND
6 GND
7 GND
8 GND
9V
out
10 V
out
11 (+)Sense
12 Vo Adjust
* Denotes negative logic:
Open = Output enabled
Ground = Output disabled
Standard Application
12
V
IN
C
IN
560 µF
(Required)
Inhibit
GND
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2–4
PT6360
+
1
11
5–8
C
330 µF
(Optional)
OUT
9–10
(+)Sense
+
Vo Adjust
V
OUT
GND
L
O
A
D
Cin= Required 560 µF
C
= Optional 330 µF
out
PT6360 Series
11 A 12-V Input Adjustable
Integrated Switching Regulator
Performance Specifications (Unless otherwise stated, T
=25 °C, Vin =12 V, Cin =560 µF, C
a
SLTS179A - JANUARY 2003 - REVISED APRIL 2003
=0 µF, and Io =Iomax)
out
PT6360 SERIES
Characteristics Symbols Conditions Min Typ Max Units
Output Current I
Input Voltage Range V
o
in
Vin =12 V V
Over Io range 10.8 — 13.2 V
< 3.3 V 0 — 11
o
V
≥ 3.3 V 0 — 10
o
Set-Point Voltage Tolerance Vo tol — — ±2 %V
Temperature Variation ∆Reg
Line Regulation ∆Reg
Load Regulation ∆Reg
Total Output Variation ∆Reg
temp
line
load
tot
Efficiency η I
V
Ripple (pk-pk) V
o
r
Transient Response 1 A/µs load step, 50 to 100 % Iomax,
t
tr
∆V
Over-Current Threshold I
tr
TRIP
Output Voltage Adjust Vo adj With Vo Adjust — ±15
Switching Frequency ƒ
Inhibit Control (pin1) Referenced to GND (pins 5–8)
Input High Voltage V
Input Low Voltage
Input Low Current
s
IH
V
IL
I
IL Pin 1 to GND — –10 — µA
–40 °C <Ta < +85 °C — ±0.5 — %V
Over Vin range — ±3 — mV
Over Io range — ±5 — mV
Includes set-point, line, load,
–40 °C ≤ Ta ≤ +85 °C
=8 A PT6361 ( 5 V) — 93 —
o
20 MHz bandwidth V
=330 µF
C
out
PT6362 (3.3 V) — 91 —
PT6363 (2.5 V) — 90 —
PT6364 (1.8 V) — 87 — %
PT6365 (1.5 V) — 85 —
PT6366 (1.2 V) — 82 —
PT6367 (1.0 V) — 80 —
= 5.0 V — 50 —
o
= 3.3 V — 25 — mV
V
o
V
≤ 2.5 V — 15 —
o
Recovery Time — 50 — µSec
Vo over/undershoot — 70 — mV
——±3%V
Reset, followed by auto-recovery — 16 — A
(1)
—%
Over Vin and Io ranges 300 350 400 kHz
2 — Open
–0.2 — 0.3
(2)
Standby Input Current Iin standby Pin 1 to GND — 5 — mA
External Input Capacitance C
External Output Capacitance C
Operating Temperature Range T
Solder Reflow Temperature T
Storage Temperature T
Reliability MTBF Per Bellcore TR-332
Mechanical Shock Mil-STD-883D, Method 2002.3
Mechanical Vibration Mil-STD-883D, Method 2007.2,
in
out
a
reflow
s
Over Vin range –40 — 85
Surface temperature of pins or case — — 215
— –40 — 125 °C
50% stress, Ta =40°C, ground benign
Half Sine, mounted to a fixture
20-2000 Hz, PCB mounted
(3)
560
0 330
——µF
(4)
5,000 µF
(5)
(6)
8.0 — — 10
— 500 — G’s
— 20
(7)
—G’s
Weight — — — 10 — grams
Flammability — Materials meet UL 94V-0
Notes:
(1) This is a typical value. For the adjustment limits of a specific model consult the related application note on output voltage adjustment.
(2) The Inhibit control (pin 1) has an internal pull-up to Vin, and if left open-circuit the module will operate when input power is applied. A small low-
leakage (<100 nA) MOSFET is recommended to control this input. See application notes for more information.
(3) A 560 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimumm of 1.3 Arms of ripple current.
(4) An external output capacitor is not required for basic operation. Adding 330µF of distributed capacitance at the load will improve the transient response,
and reduce output ripple voltage.
(5) See SOA curves or consult factory for the appropriate derating.
(6) During solder reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215 °C. For
further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products,” (SLTA051).
(7) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
A
o
o
o
pp
V
°C
°C
6
Hrs
For technical support and more information, see inside back cover or visit www.ti.com
PT6360 Series
)
)
)
11 A 12-V Input Adjustable
Integrated Switching Regulator
Pin Descriptions
Vin: The positive supply voltage input for the module
with respect to the common GND.
Vout: This is the regulated output voltage from the module with respect to the common GND.
GND: The common node to which the input, output, and
external control signals are referenced.
Inhibit*: This is an open-collector (open-drain) negative
logic input, that is referenced to GND. Driving this pin to
GND disables the module’s output voltage. If Inhibit* is
left open-circuit, the output will be active whenever a
valid input source is applied.
SLTS179A - JANUARY 2003 - REVISED APRIL 2003
Vo Adjust: This pin is used to trim the output voltage to a
value within the range of approximately ±15 % of nominal.
The adjustment method uses an external resistor. The
resistor is connected from V
Adjust to either the GND
o
or (+)Sense, in order to adjust the output either up or
down, respectively.
(+)Sense: An external remote sense input is provided to
allow the regulation circuit to compensate for voltage
drop between the module and the load. For optimal
voltage accuracy (+)Sense should be connected to V
out
. If
desired, (+)Sense may also be left open circuit.
Typical Characteristics
Performance Data; Vin =12 V (See Note A)
Efficiency vs Output Current
100
90
80
70
Efficiency - %
60
50
0246810
Output Ripple vs Output Current
100
80
60
40
Ripple - mV
20
Iout (A
PT6361
PT6362
PT6363
PT6364
PT6365
PT6366
PT6367
PT6361
PT6362
PT6363
PT6364
PT6365
PT6366
PT6367
Power Dissipation vs Output Current
5
4
3
2
Pd - Watts
1
0
0246810
Iout (A
PT6361
PT6362
PT6363
PT6364
PT6365
PT6366
PT6367
0
0246810
Iout (A
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
For technical support and more information, see inside back cover or visit www.ti.com
)
)
)
)
)
PT6360 Series
11 A 12-V Input Adjustable
Integrated Switching Regulator
Safe Operating Curves, Vin =12 V (See Note B)
PT6361, Vo =5 V, 0–10 A
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
0246810
PT6362, Vo =3.3 V, 0–10 A
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
0246810
Iout (A
Iout (A
Airflow
200LFM
120LFM
60LFM
Nat conv
Airflow
200LFM
120LFM
60LFM
Nat Conv
SLTS179A - JANUARY 2003 - REVISED APRIL 2003
Safe Operating Curves, Vin =12 V (See Note B)
PT6363, Vo =2.5 V, 0–11 A
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
0246810
PT6364, Vo =1.8 V, 0–11 A
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
0246810
Iout (A
Iout (A
Airflow
200LFM
120LFM
60LFM
Nat conv
Airflow
200LFM
120LFM
60LFM
Nat conv
PT6366, Vo =1.2 V, 0–11 A
90
80
70
60
50
40
Ambient Temperature (°C)
30
20
0246810
Iout (A
Airflow
200LFM
120LFM
60LFM
Nat conv
Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT6360 Series
Operating Features and System Considerations
for the PT6360 Regulator Series
The PT6360 is a series of integrated switching regulators
(ISRs) that operate off a 12-V input to provide stepdown voltage conversion for output loads of up to 11 A.
Power up & Soft-Start Timing
Following either the application of a valid input source
voltage, or the removal of a ground signal to the Inhihit
control pin (with input power applied), the regulator will
initiate a soft-start power up. A soft start slows the rate at
which the output voltage rises and introduces a short time
delay, td (approx. 10 ms), into the power-up sequence.
Figure 1-1 shows the power-up characteristic of a PT6363
(2.5-V output) with an 8.3-A load. Note that the initial
step of input current when the input voltage begins to
rise is the input capacitor(s) charging.
Figure 1-1
Vin (5V/Div)
Vo (1V/Div)
t
d
Output Remote Sense
The (+)Sense pin allows the regulator to compensate for
limited amounts of ‘IR’ voltage drop in the positive output
connection resistance. This is the voltage drop incurred
in the PCB trace between Vout (pins 9 & 10) of the regulator and the load some distance away. Connecting (+)Sense
to the positive load terminal improves the voltage regulation at the load, particularly when the load current
fluctuates. Although not recommended, leaving (+)Sense
disconnected will not damage the regulator or the load
circuitry. An internal 10 Ω resistor, connected between
the sense pin and the output, keeps the output voltage in
regulation.
With the sense pin connected, the difference between
the voltage measured between V
regulator, and that measured from (+)Sense to GND, is
the amount of IR drop being compensated by the regulator. This should be limited to 0.3 V maximum.
Note: The remote sense feature is not designed to compensate
for the forward drop of non-linear or frequency dependent
components that may be placed in series with the converter
output. Examples include OR-ing diodes, filter inductors,
ferrite beads, and fuses. When these components are enclosed
by the remote sense connections they are effectively placed
inside the regulation control loop, which can adversely affect
the stability of the regulator.
and GND at the
out
Iin (2A/Div)
HORIZ SCALE: 5ms/Div
Over-Current Protection
To protect against load faults, these ISRs incorporate
output over-current protection. Applying a load that
exceeds the over-current threshold (see data sheet specifications) will cause the regulated output to shut down.
Following shutdown the ISR will periodically attempt to
recover by initiating a soft-start power-up. This is often
described as a “hiccup” mode of operation, whereby the
module continues in a cycle of successive shutdown and
power up until the load fault is removed. During this
period, the average current flowing into the fault is
significantly reduced. Once the fault is removed, the
converter automatically recovers and returns to normal
operation.
For technical support and more information, see inside back cover or visit www.ti.com
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