Datasheet
ELECTRICAL CHARACTERISTICS
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ...................................................................................................................................................
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operating at 25 ° C free-air temperature, V
I
= 24 V, V
O
= 12 V, I
O
= I
O
(max), C
I
= 3 × 4.7 µ F, C
O
= 100 µ F (unless otherwise
noted)
PTN78060H
PARAMETER TEST CONDITIONS
MIN TYP MAX UNIT
V
O
= 12 V 0 3
(1)
T
A
= 85 ° C, natural convection
I
O
Output current V
O
= 15 V 0 3
(1)
A
airflow
V
O
= 22 V 0 2
(1)
V
I
Input voltage range Over I
O
range 15
(2)
36 V
Set-point voltage tolerance T
A
= 25 ° C ± 2%
(3)
Temperature variation – 40 ° C to +85 ° C ± 0.5%
Line regulation Over V
I
range ± 10 mV
V
O
Load regulation Over I
O
range ± 10 mV
Includes set point, line, load
Total output voltage variation ± 3%
(3)
– 40 < T
A
< 85 ° C
V
I
< 19 V 11.85 V
I
– 3
19 V ≤ V
I
≤ 25 V 11.85 V
I
– 4
V
O
(adj) Output voltage adjust range V
V
I
≥ 26 V 11.85 22
V
I
= 24 V, R
SET
= 383 k Ω , V
O
= 12 V 93%
η Efficiency V
I
= 24 V, R
SET
= 15 k Ω , V
O
= 15 V 95%
I
O
= 2 A, V
I
= 32 V, R
SET
= 95.3 Ω , V
O
= 22 V, 96%
Output voltage ripple 20-MHz bandwidth 1.2% V
O
V
(PP)
I
O (LIM)
Current limit threshold Δ V
O
= – 50 mV 5.5 A
1-A/ µ s load step from 50% to 100% I
O
max
Transient response Recovery time 100 µ s
V
O
over/undershoot 5 %V
O
Input high voltage (V
IH
) 1 Open
(4)
V
Inhibit control (pin 3) Input low voltage (V
IL
) – 0.1 0.3
Input low current (I
IL
) 0.25 mA
I
I(stby)
Input standby current Pin 3 connected to GND 17 mA
F
S
Switching frequency Over V
I
and I
O
ranges 440 550 660 kHz
C
I
External input capacitance Ceramic or nonceramic 14.1
(5)
µ F
Ceramic 0 200
µ F
C
O
External output capacitance Nonceramic 100
(6)
2,000
Equivalent series resistance (nonceramic) 10
(7)
m Ω
Per Telcordia SR-332, 50% stress,
MTBF Calculated reliability 8.9
10
6
Hr
T
A
= 40 ° C, ground benign
(1) The maximum output current is 3 amps or a maximum output power of 45 W, whichever is less. See the Application Information section
for further guidance.
(2) For output voltages less than 19 V, the minimum input voltage is 15 V or (V
O
+ 3) V, whichever is greater. For output voltages of 19 V
and higher, the minimum input voltage is (V
O
+ 4) V. See the Application Information for further guidance.
(3) The set-point voltage tolerance is affected by the tolerance and stability of R
SET
. The stated limit is unconditionally met if R
SET
has a
tolerance of 1% with 100 ppm/ ° C or better temperature stability.
(4) This control pin has an internal pullup, and if left open-circuit, the module operates when input power is applied. The open-circuit voltage
is typically 1.5 V. A small, low-leakage ( < 100 nA) MOSFET is recommended for control. See the Application Information section for
further guidance.
(5) Three external 4.7- µ F ceramic capacitors are required across the input (V
I
and GND) for proper operation. Locate the capacitor close to
the module.
(6) 100 µ F of output capacitance is required for proper operation. See the Application Information section for further guidance.
(7) This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 17 m Ω as the minimum when using max-ESR values to
calculate.
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