Datasheet

3
LT1054
E
LECTR
IC
AL C CHARA TERIST
ICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current I
LOAD
= 0mA
V
IN
= 3.5V ● 2.5 4.0 mA
V
IN
= 15V ● 3.0 5.0 mA
Supply Voltage Range ● 3.5 15 V
Voltage Loss (V
IN
– |V
OUT
|)C
IN
= C
OUT
= 100µF Tantalum (Note 3)
I
OUT
= 10mA ● 0.35 0.55 V
I
OUT
= 100mA ● 1.10 1.60 V
Output Resistance ∆I
OUT
= 10mA to 100mA (Note 4) ● 10 15 Ω
Oscillator Frequency 3.5V ≤ V
IN
≤ 15V ● 15 25 35 kHz
Reference Voltage I
REF
= 60µA, T
J
= 25°C 2.35 2.50 2.65 V
● 2.25 2.75 V
Regulated Voltage V
IN
= 7V, T
J
= 25°C, R
L
= 500Ω (Note 5) –4.70 –5.00 –5.20 V
Line Regulation 7V ≤ V
IN
≤ 12V, R
L
= 500Ω (Note 5) ● 525 mV
Load Regulation V
IN
= 7V, 100Ω ≤ R
L
≤ 500Ω (Note 5) ● 10 50 mV
Maximum Switch Current 300 mA
Supply Current in Shutdown V
PIN1
= 0V ● 100 200 µA
Note 4: Output resistance is defined as the slope of the curve, (∆V
OUT
vs
∆I
OUT
), for output currents of 10mA to 100mA. This represents the linear
portion of the curve. The incremental slope of the curve will be higher at
currents <10mA due to the characteristics of the switch transistors.
Note 5: All regulation specifications are for a device connected as a
positive-to-negative converter/regulator with R1 = 20k, R2 = 102.5k,
C1 = 0.002µF, (C1 = 0.05µF S package) C
IN
= 10µF tantalum,
C
OUT
= 100µF tantalum.
Note 6: The S8 package uses a different die than the H, J8, N8 and S
packages. The S8 device will meet all the existing data sheet parameters.
See Regulation and Capacitor Selection in the Applications Information
section for differences in application requirements.
The
● denotes specifications which apply over the full operating
temperature range. For C grade parts these specifications also apply up to
a junction temperature of 100°C.
Note 1: The absolute maximum supply voltage rating of 16V is for
unregulated circuits. For regulation mode circuits with V
OUT
≤ 15V at
pin 5, (pin 11 S package) this rating may be increased to 20V.
Note 2: The devices are guaranteed by design to be functional up to the
absolute maximum junction temperature.
Note 3: For voltage loss tests, the device is connected as a voltage
inverter, with pins 1, 6, and 7 (3, 12, and 13 S package) unconnected.
The voltage losses may be higher in other configurations.
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Shutdown Threshold
TEMPERATURE (°C)
–50–70
15
FREQUENCY (kHz)
25
35
0
50
75
LT1054 • TPC03
–25 25
100
125
V
IN
= 15V
V
IN
= 3.5V
Oscillator Frequency
INPUT VOLTAGE (V)
0
0
SUPPLY CURRENT (mA)
1
2
3
4
5
I
L
= 0
5
10 15
LT1054 • TPC02
Supply Current
TEMPERATURE (˚C)
–50
SHUTDOWN THRESHOLD (V)
0.4
0.5
0.6
25 75
LT1054 • TPC01
0.3
0.2
–25 0
50 100 125
0.1
0
V
PIN1
(Note 6)