Datasheet
SLVS423 A− MAY 2002 − REVISED SEPTEMBER 2002
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN MAX UNIT
Supply voltage, V
CC
3.6 20 V
Error amplifier common-mode input voltage −0.2 1.45 V
Output voltage, V
O
20 V
Output current, I
O
± 40 mA
COMP source current −45 µA
COMP sink current 100 µA
Reference output current 1 mA
COMP dc load resistance 100 kΩ
Timing capacitor, C
T
10 4000 pF
Timing resistor, R
T
5.1 100 kΩ
Oscillator frequency 50 2000 kHz
Operating free-air temperature, T
A
TL1454AC −20 85 °C
electrical characteristics over recommended operating free-air temperature range, V
CC
= 6 V,
f
osc
= 500 kHz (unless otherwise noted)
reference
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
V
ref
Output voltage, REF
I
O
= 1 mA, T
A
= 25°C 1.22 1.26 1.32
V
V
ref
Output voltage, REF
I
O
= 1 mA
1.20 1.34
V
Input regulation V
OC
= 3.6 V to 20 V, I
O
= 1 mA 2 6 mV
Output regulation I
O
= 0.1 mA to 1 mA 1 7.5 mV
Output voltage change with temperature
T
A
= T
A(min)
to 25°C, I
O
= 1 mA −12.5 −1.25 12.5
mV
Output voltage change with temperature
T
A
= 25°C to 85°C, I
O
= 1 mA −12.5 −2.5 12.5
mV
I
OS
Short-circuit output current V
ref
= 0 V 30 mA
undervoltage lockout (UVLO)
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
V
IT+
Positive-going threshold voltage 2.9 V
V
IT−
Negative-going threshold voltage
T
A
= 25°C
2.7 V
V
hys
Hysteresis, V
IT+
− V
IT−
T
A
= 25 C
100 200 mV
short-circuit protection (SCP)
PARAMETER
TEST CONDITIONS
TL1454A
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
V
IT
Input threshold voltage T
A
= 25°C 0.93 1 1.07 V
V
stby
†
Standby voltage
No pullup
140 185 230 mV
V
I(latched)
Latched-mode input voltage
No pullup
60 120 mV
V
IT(COMP)
Comparator threshold voltage COMP1, COMP2 1 V
Input source current T
A
= 25°C, V
O(SCP)
= 0 −5 −15 −20 µA
†
This symbol is not presently listed within EIA/JEDEC standards for semiconductor symbology.