Datasheet

3
LT1054/LT1054L
1054lfe
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 7)
E
LECTR
IC
AL C CHARA TERIST
ICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current I
LOAD
= 0mA LT1054: V
IN
= 3.5V ● 2.5 4.0 mA
V
IN
= 15V ● 3.0 5.0 mA
LT1054L: V
IN
= 3.5V ● 2.5 4.0 mA
V
IN
= 7V ● 3.0 5.0 mA
Supply Voltage Range LT1054 ● 3.5 15 V
LT1054L
● 3.5 7 V
Voltage Loss (V
IN
– V
OUT
)C
IN
= C
OUT
= 100µF Tantalum (Note 4)
I
OUT
= 10mA ● 0.35 0.55 V
I
OUT
= 100mA ● 1.10 1.60 V
I
OUT
= 125mA (LT1054L) ● 1.35 1.75 V
Output Resistance ∆I
OUT
= 10mA to 100mA (Note 5) ● 10 15 Ω
Oscillator Frequency LT1054: 3.5V ≤ V
IN
≤ 15V ● 15 25 40 kHz
LT1054L: 3.5V ≤ V
IN
≤ 7V ● 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 6) –4.70 –5.00 –5.20 V
Line Regulation LT1054: 7V ≤ V
IN
≤ 12V, R
L
= 500Ω (Note 6) ● 525 mV
Load Regulation V
IN
= 7V, 100Ω ≤ R
L
≤ 500Ω (Note 6) ● 10 50 mV
Maximum Switch Current 300 mA
Supply Current in Shutdown V
PIN1
= 0V ● 100 200 µA
Note 5: 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 6: 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 7: 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.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The absolute maximum supply voltage rating of 16V is for
unregulated circuits using LT1054. For regulation mode circuits using
LT1054 with V
OUT
≤ 15V at Pin 5 (Pin 11 on S package), this rating may
be increased to 20V. The absolute maximum supply voltage for LT1054L
is 7V.
Note 3: The devices are guaranteed by design to be functional up to the
absolute maximum junction temperature.
Note 4: 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.