Datasheet

APPLICATION 1: BUCK REGULATOR 8-V TO 16-V INPUT, 1.8-V OUTPUT AT 10 A
TPS40077
www.ti.com ..................................................................................................................................................... SLUS714D – JANUARY 2007 – REVISED APRIL 2009
Table 3. Specifications
PARAMETER NOTES AND CONDITIONS MIN NOM MAX UNITS
INPUT CHARACTERSTICS
V
IN
Input voltage 8 12 16 V
I
IN
Input current V
IN
= NOM, I
OUT
= MAX 1.8 2 A
No-load input current V
IN
= NOM, I
OUT
= 0 A 62.6 3.6 mA
V
IN_UVLO
Input UVLO I
OUT
= MIN to MAX 5.4 6 6.6 V
V
IN_ONV
Input ONV I
OUT
= MIN to MAX 6.3 7 7.7 V
OUTPUT CHARACTERSTICS
V
OUT
Output voltage V
IN
= NOM, I
OUT
= NOM 1.75 1.8 1.85 V
Line regulation
(1)
V
IN
= MIN to MAX, I
OUT
= NOM 0.5%
Load regulation
(1)
V
IN
= NOM, I
OUT
= MIN to MAX 0.5%
V
OUT_ripple
Output voltage ripple V
IN
= NOM, I
OUT
= MAX 100 mVpp
I
OUT
Output current V
IN
= MIN to MAX 0 5 10 A
Output overcurrent
I
OCP
V
IN
= NOM, V
OUT
= V
OUT
– 5% 12.25 19.4 34 A
inception point
V
OVP
Output OVP I
OUT
= MIN to MAX NA NA NA
Transient response
Δ I Load step I
OUT_Max
to 0.2 × I
OUT _Max
8 A
Load slew rate 10 A/ µ s
Overshoot 200 mV
Settling time 1 ms
SYSTEM CHARACTERSTICS
f
SW
Switching frequency 240 300 360 kHz
η
pk
Peak efficiency V
IN
= NOM, I
OUT
= MIN to MAX 90%
η Full-load efficiency V
IN
= NOM, I
OUT
= MAX 90%
Operating temperature
T
op
V
IN
= MIN to MAX, I
OUT
= MIN to MAX – 40 25 85 ° C
range
MECHANICAL CHARACTERSTICS
2 Inches
L Width
5.08 cm
3 Inches
W Length
7.62 cm
0.41 Inch
h Component height
1.04 cm
(1) Voltage accuracy is dependent on resistor tolerance and reference accuracy. Line and load regulation are calculated with respect to the
actual set point voltage.
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