Datasheet

TPS6734I
FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY
SLVS127A – AUGUST 1995 – REVISED JANUARY 1999
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage 2.7 5 12 V
Compensation capacitor 0.001 µF
Output current at REF 0 100 µA
Reference capacitor 0.01 µF
Operating free-air temperature, T
A
–40 85 °C
electrical characteristics over recommended operating free-air temperature range, V
CC
= 5 V,
I
O(LOAD)
= 0 mA, EN = 5 V, typical values are at T
A
= 25°C (unless otherwise noted) (refer to circuit
shown in Figure 13)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Operating Entire circuit 1.2 2.5 mA
Supply current
Standby
EN = 0.4 V, entire circuit 3 µA
Standb
y
EN = 0.4 V, into V
CC
3 µA
High-level input threshold voltage at EN 2 V
Low-level input threshold voltage at EN 0.4 V
Shutdown input leakage current at EN –1 1 µA
On resistance at OUT Current at OUT = 500 mA 0.7 Ω
Leakage current at OUT V
DS
= 12 V 1 µA
Reference voltage 1.22 V
Reference drift T
A
= –40°C to 85°C 6.7 ppm/°C
Oscillator frequency 170 kHz
Compensation pin impedance 7500 Ω
performance characteristics over recommended operating free-air temperature range, typical
circuit connected as shown in Figure 13, typical values are at T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Output voltage V
CC
= 4.75 V, 0 mA < I
O(LOAD)
< 120 mA 11.64 12.12 12.6 V
Load current
V
CC
= 3.75 V 120 150
mA
Load
c
u
rrent
V
CC
= 3.0 V, Figure 11 150
mA
Line regulation V
CC
= 5 V to 12 V, I
O(LOAD)
= 50 mA 0.20%
Load regulation I
O(LOAD)
= 0 mA to 120 mA 0.0042%
Efficiency V
CC
= 5 V, I
O(LOAD)
= 120 mA 86%