PT6705 Datasheet, PDF (1/6 Pages) Texas Instruments – 13 Amp 5V/3.3V Input Adjustable Integrated Switching Regulator

PT6705 Series
13 Amp 5V/3.3V Input Adjustable
Integrated Switching Regulator
New ^{Space-Saving Package}
• +3.3V/5V input (+12V Bias)
• Adjustable Output Voltage
• 90% Efficiency
• Differential Remote Sense
• 17-pin Space-Saving Package
• Solderable Copper Case
• Short Circuit Protection
SLTS099
(Revised 6/30/2000)
The PT6705 is a series of low-cost,
high-performance, 13 Amp Integrated
Switching Regulators (ISRs) housed in a
unique, space-saving 17-pin SIP package.
The PT6705 will operate off either a 5V
or 3.3V input bus to provide a low-voltage
power source for the industry’s latest high-
speed, low-voltage µPs, and bus drivers.
The PT6705 incorporates internal
short circuit protection, and requires a
+12V/50mA bias input for operation.
Patent pending on package assembly
Standard Application
STBY*
+12V BIAS
V_IN
L1
4-6
1H
Vout Adjust
32
REMOTE SENSE (+)
1 17
PT6705 ^{13 - 16}
V_OUT
GND
+
C_IN
8 - 12
7
+
C_OUT
REMOTE
SENSE (-)
Cin = Required 1000µF electrolytic
Cout= Required 330µF electrolytic
L1 = Optional 1µH input choke
LOAD
GND
Pin-Out Information
Pin Function
1 Vout Adjust
2 STBY*
3 +12V Bias Input
4 Vin
5 Vin
6 Vin
7 Remote Sense Gnd (4)
8 GND
9 GND
Pin Function
10 GND
11 GND
12 GND
13 V_out
14 Vout
15 V_out
16 Vout
17 Remote Sense V_out
For STBY* pin
open = output enabled
ground = output disabled.
Specifications
Characteristics
(T_a = 25°C unless noted)
Output Current
Input Voltage Range
External Bias Voltage Range
External Bias Current
Output Voltage Tolerance
Short-Circuit Threshold
Line Regulation
Load Regulation
V_o Ripple/Noise
Transient Response
with C_out = 330µF
Efficiency
Symbols
Io
Vin
Vb
Ib
∆V_o
I_sc
Regline
Regload
V_n
ttr
V_os
η
Switching Frequency
ƒo
Absolute Maximum
Ta
Operating Temperature Range
Storage Temperature
Ts
Mechanical Shock
Conditions
Ta = +60°C, 200 LFM, pkg N
T_a = +25°C, natural convection
0.1A ≤Io ≤13A
PT6705/6
PT6707/8
0.1A ≤Io ≤13A, –40°C ≤Ta ≤+85°C
0.1A ≤Io ≤13A, –40°C ≤Ta ≤+85°C
V_in = +5V, V_b = +12V, I_o =13A
-40°C ≤ Ta ≤ +85°C
V_in = +5V, V_b = +12V
4.5V ≤Vin ≤ 5.5V, Vb = +12V, Io =13A
Vin = +5V, Vb = +12V, 0.1 ≤Io ≤13A
V_in = +5V, V_b = +12V, I_o =13A
Io step between 6.5A and 13A
V_o over/undershoot
Vin = +5V, Io = 9A, Vb =+12V
Vo = 3.3V
V_o = 2.5V
Vo = 1.8V
Vo = 1.5V
4.5V ≤Vin ≤5.5V, Vb = +12V
0.1A ≤ Io ≤ 13A
Over Vin Range
—
Per Mil-STD-883D, Method 2002.3
1msec, Half sine, mounted to a fixture
PT6705 SERIES
Min
Typ
Max
0.1 (1)
—
13.0
0.1 (1)
—
13.0
4.5
—
5.5
3.1
—
5.5
11.5
12.0
13.0
—
—
50
Vo-0.03 —
Vo+0.03
—
18
30
—
±5
—
—
±10
—
—
35
—
—
50
—
—
100
—
—
91
—
—
88
—
—
85
—
—
83
—
300
350
400
-40 ⁽²⁾
—
+85 ⁽³⁾
-40
—
+125
—
500
—
Mechanical Vibration
Weight
—
Per Mil-STD-883D, Method 2007.2,
—
15
—
20-2000 Hz, Soldered in a PC board
—
—
26
—
Notes:
(1) The ISR-will operate down to no load with reduced specifications.
(2) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors.
(3) See Safe Operating Area curves, or contact the factory for appropriate derating.
(4) If the remote sense ground is not used, pin 7 must be connected to pin 8 for optimum output voltage accuracy.
Units
A
V
V
mA
V
A
mV
mV
mV
µSec
mV
%
kHz
°C
°C
G
G
grams
For technical support and more information, see inside back cover or visit www.ti.com/powertrends