PT3320 Series
30-W 48-V Input
Isolated DC/DC Converter
Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cout =330µF, and Io =Iomax)
PT3320 SERIES
Typ
Characteristic
Symbol
Conditions
Min
Max
Units
(1)
(1)
(1)
(1)
Output Current
Io
Over Vin range
Vo = 15V
Vo = 12V
Vo =5.0V
Vo ≤3.3V
0.1
—
—
—
—
2.0
2.5
6.0
8.0
0.1
A
0.25
0.25
Input Voltage Range
Set Point Voltage Tolerance
Vin
Vo tol
Over Io Range
36.0
—
—
—
—
—
—
—
—
—
48.0
1
33
0.5
0.2
7
0.4
13
2
75.0
1.5
50
—
1.0
33
1.0
33
—
V
Vo≥5.0V
Vo≤3.3V
%Vo
mV
%Vo
%Vo
mV
%Vo
mV
%Vo
mV
Temperature Variation
Line Regulation
Regtemp
Regline
–40° ≤Ta ≤ +85°C
Over Vin range
Vo≥5.0V
Vo≤3.3V
Vo ≥5.0V
Vo≤3.3V
Vo≥5.0V
Vo≤3.3V
Vo = 15V
Vo = 12V
Vo =5.0V
Vo =3.3V
Vo =1.8V
Load Regulation
Regload
∆Votot
η
Over Io range
Total Output Voltage Variation
Efficiency
Includes set-point, line, load,
–40° ≤Ta ≤ +85°C
67
—
—
—
—
—
—
85
87
84
80
69
—
—
—
—
—
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
Vo ≥5.0V
Vo ≤3.3V
—
—
—
—
—
—
400
600
—
—
1.0
50
100
3.0
100
2xIomax
500
750
34
33
2.0
75
200
5.0
150
—
600
900
—
—
%Vo
mVpp
µs
%Vo
mV
A
Transient Response
ttr
0.1A/µs load step, 50% to 100% Iomax
Vo over/undershoot
Vo ≥5.0V
Vo ≤3.3V
∆Vtr
Short Circuit Current
Switching Frequency
Isc
ƒs
Over Vin range
Vo>10V
kHz
V
Vo <10V
Under-Voltage Lockout
UVLO
V
in increasing
Vin decreasing
Remote On/Off Input (pin 2)
Input High Voltage
Input Low Voltage
Input Low Current
Referenced to –Vin (pins 4–6)
(2)
VIH
VIL
IIL
2.5
—
—
–6
8
0.66
330
330
15
V
–0.2
+0.8
–10
16
–3
—
—
260
260
µA
mA
µF
Standby Input Current
Internal Input Capacitance
External Output Capacitance
Iin standby
Cin
Cout
pins 2 & 4 connected
Between +Vo and –Vo
—
(3)
(3)
Vo ≥9V
Vo ≤5V
600
1,000
µF
Isolation Voltage
Capacitance
Resistance
Input-output/input-case
Input-output
1500
—
—
—
—
—
Vdc
pF
1200
—
Input-output
10
MΩ
(4)
(5)
Operating Temperature Range
Maximum Case Temperature
Storage Temperature Range
Reliability
T
Over Vin range
-40
—
-40
—
—
—
+85
100
°C
°C
°C
a
T
c
T
+125
s
MTBF
Per Bellcore TR-332
50% stress, Ta =40°C, ground benign
6
4.9
—
—
10 Hrs
Mechanical Shock
—
Per Mil-Std-883D, method 2002.3,
1mS, half-sine, mounted to a fixture
—
500
—
G’s
Mechanical Vibration
—
Per Mil-Std-883D, method 2007.2,
20-2000Hz, soldered in board
—
—
—
10
43
—
—
G’s
Weight
Flammability
—
—
grams
Materials meet UL 94V-0
Notes: (1) The DC/DC converter will operate at no load with reduced specifications.
(2) The Remote On/Off input has an internal pull-up. If it is left open circuit the module will operate when input power is appl ied. A low-leakage
(<100nA) MOSFET is recommended to control this input. The open-circuit voltage is less than 10V. See application notes for interface considerations.
(3) Output capacitor values are absolute. Allowances must be made for any additional de-coupling capacitors and the total external capacitor tolerance.
The value of external capacitance is limited due to regulator startup current requirements. Consult the factory for further details.
(4) For operation below 0°C, the required external output capacitor must have temperature stable characteristics. E.g. Tantalumor Oscon® types.
(5) See Safe Operating Area curves or contact the factory for the appropriate thermal derating.
For technical support and more information, see inside back cover or visit www.ti.com