Datasheet

LT1054
SWITCHED-CAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS
T
A
†
LT1054C
LT1054I
UNIT
PARAMETER
TEST
CONDITIONS
T
A
†
MIN TYP
‡
MAX
UNIT
V
O
Regulated output voltage V
CC
= 7 V, T
J
= 25°C, R
L
= 500 Ω, See Note 5 25°C −4.7 −5 −5.2 V
Input regulation V
CC
= 7 V to 12 V, R
L
= 500 Ω, See Note 5 Full range 5 25 mV
Output regulation V
CC
= 7 V, R
L
= 100 Ω to 500 Ω, See Note 5 Full range 10 50 mV
Volta
g
e loss,
C C 100 F tantalum
I
O
= 10 mA
Full range
0.35 0.55
V
Voltage
loss
,
V
CC
− |V
O
⎜ (see Note 6)
C
I
= C
O
= 100-μF tantalum
I
O
= 100 mA
Full range
1.1 1.6
V
Output resistance ΔI
O
= 10 mA to 100 mA, See Note 7 Full range 10 15 Ω
Oscillator frequency V
CC
= 3.5 V to 15 V Full range 15 25 35 kHz
V
Reference voltage
I 60 A
25°C 2.35 2.5 2.65
V
V
ref
Reference voltage I
(REF)
= 60 μA
Full range 2.25 2.75
V
Maximum switch current 25°C 300 mA
I
Supply current
I 0
V
CC
= 3.5 V
Full range
2.5 4
mA
I
CC
Supply current I
O
= 0
V
CC
= 15 V
Full range
3 5
mA
Supply current in shutdown V
(FB/SD)
= 0 V Full range 100 200 μA
†
Full range is 0°C to 70°C for the LT1054C and −40°C to 85°C for the LT1054I.
‡
All typical values are at T
A
= 25°C.
NOTES: 5. All regulation specifications are for a device connected as a positive-to-negative converter/regulator with R1 = 20 kΩ, R2 = 102.5 kΩ,
external capacitor C
IN
= 10 μF (tantalum), external capacitor C
OUT
= 100 μF (tantalum) and C1 = 0.002 μF (see Figure 15).
6. For voltage-loss tests, the device is connected as a voltage inverter, with terminals 1, 6, and 7 unconnected. The voltage losses
may be higher in other configurations. C
IN
and C
OUT
are external capacitors.
7. Output resistance is defined as the slope of the curve (ΔV
O
versus ΔI
O
) for output currents of 10 mA to 100 mA. This represents
the linear portion of the curve. The incremental slope of the curve is higher at currents less than 10 mA due to the characteristics
of the switch transistors.