MIC68400 Datasheet, PDF (7/15 Pages) Micrel Semiconductor – 4A Sequencing LDO with Tracking and Ramp Control™

Micrel, Inc.
MIC68400
Parameter
Ramp Control
I_RC
I_{DISCHARGE(OUTPUT)} (Note 7)
Tracking Accuracy:
Fixed
(Note 8)
Tracking Accuracy: Adjustable
(Note 8)
Conditions
Ramp Control Current (V_RC = 0.75V)
V_OUT = 0.5V_NOM, V_RAMP =0V
200mV < V_RC < V_{TARGET ;} Measure (VOUT – V_RC)
Measure (VOUT - V_RC x (V_TARGET / 500mV))
Min Typ Max Units
0.7
1
1.3
µA
25
45
70
mA
-50
25
100
mV
-10
15
50
mV
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T_A (ambient temperature) is P_D(max) = T_J(max) – T_A) / θ_JA. Exceeding the maximum
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. Timer High Voltage along with Delay pin current (1µA nom) determines the delay per µF of capacitance. Typical delay is 1.1sec/µF.
7. Discharge current is the current drawn from the output to ground to actively discharge the output capacitor during the shutdown process.
8. V_TARGET is the output voltage of an adjustable with customer resistor divider installed between V_OUT and Adj/Sns pin, or the rated output
voltage of a fixed device.
September 2007
7
M9999-090607-C