LT1054_06 Datasheet, PDF (2/27 Pages) Texas Instruments – SWITCHED-CAPACITOR VOLTAGE CONVERTERS WITH REGULATORS

LT1054
SWITCHEDĆCAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
functional block diagram
VREF
6
VCC
8
Ref
FB/SD ¹
7
OSC
2.5 V
R
+
−
R
Q
OSC
Q
Drive
Drive
CAP +
CAP −
2
CIN†
4
Drive
† _{External capacitors}
Pin numbers shown are for the P package.
Drive
3
GND
COUT†
5
VOUT
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^‡
Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 V
Input voltage range, V_I: FB/SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V_CC
OSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V_ref
Junction temperature, T_J (see Note 2): LT1054C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125°C
LT1054I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135°C
Package thermal impedance, θ_JA (see Notes 3 and 4): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . 57°C/W
P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C
‡ _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The absolute maximum supply-voltage rating of 16 V is for unregulated circuits. For regulation-mode circuits with VOUT ≤ 15 V, this
rating may be increased to 20 V.
2. The devices are functional up to the absolute maximum junction temperature.
3. Maximum power dissipation is a function of TJ(max), θ_JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) − TA)/θ_JA. Operating at the absolute maximum TJ of 150°C can impact reliability.
4. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
VCC
TA
Supply voltage
Operating free-air temperature range
LT1054C
LT1054I
MIN MAX UNIT
3.5
15 V
0
70
°C
−40
85
2
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