LT1054_06 Datasheet, PDF (3/27 Pages) Texas Instruments – SWITCHED-CAPACITOR VOLTAGE CONVERTERS WITH REGULATORS

LT1054
SWITCHEDĆCAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
LT1054C
TA†
LT1054I
UNIT
MIN TYP‡ MAX
VO Regulated output voltage
Input regulation
Output regulation
Voltage loss,
VCC − |VO (see Note 6)
Output resistance
Oscillator frequency
Vref Reference voltage
VCC = 7 V, TJ = 25°C, RL = 500 Ω, See Note 5
VCC = 7 V to 12 V, RL = 500 Ω, See Note 5
VCC = 7 V, RL = 100 Ω to 500 Ω, See Note 5
CI = CO = 100-µF tantalum
IO = 10 mA
IO = 100 mA
∆IO = 10 mA to 100 mA,
See Note 7
VCC = 3.5 V to 15 V
I(REF) = 60 µA
25°C
−4.7
−5 −5.2 V
Full range
5
25 mV
Full range
10
50 mV
Full range
0.35 0.55
V
1.1 1.6
Full range
10
15 Ω
Full range
15
25
35 kHz
25°C
2.35 2.5 2.65
V
Full range 2.25
2.75
Maximum switch current
25°C
300
mA
ICC Supply current
IO = 0
VCC = 3.5 V
VCC = 15 V
Full range
2.5
4
mA
3
5
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 TA = 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 CIN = 10 µF (tantalum), external capacitor COUT = 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. CIN and COUT are external capacitors.
7. Output resistance is defined as the slope of the curve (∆VO versus ∆IO) 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.
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