LTC3261_15 Datasheet, PDF (3/14 Pages) Linear Technology – High Voltage, Low Quiescent Current Inverting Charge Pump

LTC3261
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 2). V_IN = EN = 12V, MODE = 0V, RT = 200kΩ.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Charge Pump
V_IN
V_UVLO
I_VIN
Input Voltage Range
V_IN Undervoltage Lockout Threshold
V_IN Quiescent Current
V_RT
RT Regulation Voltage
V_OUT
V_OUT Regulation Voltage
f_OSC
R_OUT
I_{SHORT_CKT}
V_MODE(H)
V_MODE(L)
I_MODE
V_EN(H)
V_EN(L)
I_EN
Oscillator Frequency
Charge Pump Output Impedance
Max I_VOUT Short-Circuit Current
MODE Threshold Rising
MODE Threshold Falling
MODE Pin Internal Pull-Down Current
EN Threshold Rising
EN Threshold Falling
EN Pin Internal Pull-Down Current
V_IN Rising
V_IN Falling
Shutdown, = EN = 0V
MODE = V_IN, I_VOUT = 0mA
MODE = 0V, I_VOUT = 0mA
MODE = 12V
MODE = 0V
RT = GND
MODE = 0V, RT = GND
V_OUT = GND, RT = GND
V_IN = MODE = 32V
V_IN = EN = 32V
l 4.5
32
V
l
3.8
4
V
l 3.4
3.6
V
2
5
µA
60
120
µA
3.5
5.5
mA
1.200
V
–0.94 • V_IN
V
–V_IN
V
450
500
550
KHz
32
Ω
l 100
160
250
mA
l
1.1
2
V
l 0.4
1.0
V
0.7
µA
l
1.1
2
V
l 0.4
1.0
V
0.7
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3261 is tested under pulsed load conditions such that
T_J ≈ T_A. The LTC3261E is guaranteed to meet specifications from
0°C to 85°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3261I is guaranteed over the –40°C to 125°C operating junction
temperature range, the LTC3261H is guaranteed over the –40°C to 150°C
operating junction temperature range and the LTC3261MP is tested and
guaranteed over the full –55°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes; operating
lifetime is derated for junction temperatures greater than 125°C. Note that
the maximum ambient temperature consistent with these specifications
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors.
The junction temperature (T_J, in °C) is calculated from the ambient
temperature (T_A, in °C) and power dissipation (P_D, in Watts) according to
the formula:
T_J = T_A + (P_D • θ_JA),
where θ_JA = 40°C/W is the package thermal impedance.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 150°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may result in device degradation or failure.
For more information www.linear.com/3261
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