Datasheet

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ELECTRICAL CHARACTERISTICS
PTV12010L
PTV12010W
SLTS234B – DECEMBER 2004 – REVISED FEBRUARY 2007
operating at 25°C free-air temperature, V
I
= 12 V, V
O
= 3.3 V, C1 = 100 µF, C2 = 10 µF, C3 = 0 µF, and I
O
= I
O
max (unless
otherwise noted)
PTV12010W
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX
I
O
Output current Natural convection airflow 0 8
(1)
A
V
I
Input voltage range Over I
O
load range 10.8 13.2 V
Set-point voltage tolerance ±2%
(2)
Temperature variation –40°C < T
A
< 85°C ±0.5%
Line regulation Over V
I
range ±10 mV
V
O
Load regulation Over I
O
range ±12 mV
Total output variation Includes set-point, line, load, –40°C ≤ T
A
≤ 85°C ±3
(2)
%V
o
Adjust range Over V
I
range 1.2 5.5 V
R
SET
= 280 Ω , V
O
= 5 V 92%
R
SET
= 2.0 k Ω , V
O
= 3.3 V 90%
R
SET
= 4.32 k Ω , V
O
= 2.5 V 88%
η Efficiency I
O
= I
O
max
R
SET
= 11.5 k Ω , V
O
= 1.8 V 85%
R
SET
= 24.3 k Ω , V
O
= 1.5 V 83%
R
SET
= open cct., V
O
= 1.2 V 80%
Output voltage ripple
20-MHz bandwidth 20 mV
PP
(peak-to-peak)
I
O
(trip) Overcurrent threshold Reset, followed by auto-recovery 16 A
1-A/µs load step, 50 to 100% I
O
max, C3 = 100 µF
Transient response Recovery time 70 µs
V
o
over/undershoot 100 mV
I
IL
Input low current Pin to GND –0.13 mA
Track control (pin 5)
Control slew-rate limit C3 ≤ C3 (max) 1 V/ms
V
I
increasing 9.5 10.4
UVLO Undervoltage lockout V
V
I
decreasing 8.8 9
V
IH
Input high voltage Open
(3)
Referenced to GND V
Inhibit control (pin 7) V
IL
Input low voltage –0.2 0.6
I
IL
Input low current Pin to GND –0.24 mA
I
I
(stby) Input standby current Inhibit (pin 7) to GND, Track (pin 5) open 10 mA
ƒ
S
Switching frequency Over V
I
and I
O
ranges 250 325 400 kHz
Nonceramic (C1) 100
(4)
External input capacitance µF
Ceramic (C2) 10
(4)
Nonceramic 0 100
(5)
3,300
(6)
Capacitance value µF
External output capacitance (C3) Ceramic 0 300
Equivalent series resistance (nonceramic) 4
(7)
m Ω
Per Telcordia SR-332, 50% stress, T
A
= 40°C, ground
MTBF Reliability 5
10
6
Hrs
benign
(1) See thermal derating curves for safe operating area (SOA), or consult factory for appropriate derating.
(2) 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.
(3) This control pin is pulled up to an internal supply voltage. To avoid risk of damage to the module, do not apply an external voltage
greater than 7 V. If this input is left open-circuit, the module operates when input power is applied. A small low-leakage (<100 nA)
MOSFET is recommended for control. For further information, consult the related application note.
(4) A 10-µF high-frequency ceramic capacitor and 100-µF electrolytic input capacitor are required for proper operation. The electrolytic
capacitor must be rated for the minimum ripple current rating. See the application information for further guidance on input capacitor
selection.
(5) An external output capacitor is not required for basic operation. Adding 100 µF of distributed capacitance at the load improves the
transient response.
(6) This is the calculated maximum. The minimum ESR limitation often results in a lower value. See the application information for further
guidance.
(7) This is the typical ESR for all the electrolytic (nonceramic) output capacitance. Use 7 m Ω as the minimum when using max-ESR values
to calculate.
3
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