Datasheet

PTN04050C
www.ti.com SLTS251A –SEPTEMBER 2005–REVISED FEBRUARY 2011
ELECTRICAL CHARACTERISTICS
operating at 25°C free-air temperature, V
I
= 5 V, V
O
= 12 V, I
O
= I
O
(max), C
I
= 100 μF, C
O
= 100 μF (unless otherwise noted)
PARAMETER TEST CONDITIONS PTN04050C
MIN TYP MAX UNIT
Over V
I
Range V
O
= 15 V 0.1
(1)
0.8
V
O
= 12 V 0.1
(1)
1.0
I
O
Output current A
V
O
= 9 V 0.1
(1)
1.3
V
O
= 5 V 0.1
(1)
2.4
V
I
Input voltage range Over I
O
range 2.95 5.5
(2)
V
Output adjust range 5 15 V
Set-point voltage tolerance T
A
= 25°C ±2
(3)
%V
O
Temperature variation –40°C to 85°C ±0.5 %V
O
V
O
Line regulation Over V
I
range ±0.5 %V
O
Load regulation Over I
O
range ±0.5 %V
O
Includes set point, line, load
Total Output Voltage
±3
(3)
%V
O
Variation
–40°C < T
A
< 85°C
V
I
= 5 V, R
SET
= 60.4 Ω, V
O
= 15 V 88%
V
I
= 5 V, R
SET
= 1.33 kΩ, V
O
= 12 V 89%
η Efficiency
V
I
= 5 V, R
SET
= 4.53 kΩ, V
O
= 9 V 90%
V
I
= 3.3 V, R
SET
= OPEN, V
O
= 5 V 87%
Output voltage ripple
20-MHz bandwith 1.5 3 %V
O
(peak-to-peak)
1 A/μs load step from 50% to 100% I
O
max
Transient response Recovery time 500 μs
V
O
over/undershoot 2.5 %V
O
I
lim
Current limit 150
(4)
%I
O
max
I
ir
Inrush current 2
(5)
A
Inrush current time
t
ir
1 ms
duration
F
S
Switching frequency Over V
I
and I
O
ranges 450 525 600 kHz
C
I
External input capacitance 100
(6)
μF
Nonceramic 100
(7)
560
(8)
μF
External output
C
O
Ceramic 0 100
(9)
capacitance
Equivalent series resistance (nonceramic) 10
(10)
mΩ
Per Telcordia SR-332, 50% stress,
MTBF Calculated reliability 8.9
10
6
Hr
T
A
= 40°C, ground benign
(1) Operation at no load is not recommended.
(2) The maximum V
I
is 5.5V or (V
O
- 0.5V) whichever is less. If the difference in V
O
to V
IN
is ≥ 0.5V and ≤ 1.4V, the device will operate in
asynchronous mode. In this condition, there may be multiple output voltage ripple frequencies and the total output voltage variation may
increase by up to 2%.
(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) Boost-topology switching regulators are not short-circuit protected.
(5) The inrush current stated is in addition to the normal input current for the associated output load.
(6) An external input capacitor is required across the input (V
I
and GND) for proper operation. See the application information for further
guidance.
(7) An external output capacitance is required for proper operation. See the application information for further guidance.
(8) The minimum ESR limitation may result in a lower value for the output capacitance. See the application information for further guidance.
(9) When using ceramic capacitors equivalent to 100 μF, a 100 μF bulk electrolytic is also required.
(10) This is the minimum ESR for all the electrolytic (nonceramic) output capacitance. Use 17 mΩ as the minimum when using maximum
ESR values to calculate.
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