AN30181A-VL Panasonic Electronic Components, AN30181A-VL Datasheet - Page 15

• Manufacturer Part Number: AN30181A-VL
• Description: Low Dropout Controllers - LDO Vout 1.2-1.8 800mA 2Ch Buck DC-DC
• Manufacturer: Panasonic Electronic Components

Specifications of AN30181A-VL

• Rohs: yes
• Input Voltage Max: 5.5 V
• Output Voltage: 1.2 v to 1.8 V
• Output Current: 0.8 A
• Load Regulation: 10 mV
• Number Of Outputs: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: HQFN-24
• Input Voltage Min: 2.9 V
• Maximum Power Dissipation: 1.472 W
• Minimum Operating Temperature: - 40 C
• Supply Current: 0.8 A

(3.3 V line)
OPERATION (Continued)
3. Protection
Protection sequence
Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed.
RESET
PCNTB
When the following state continues for 1 ms(typ), AN30181A shifts to the protection sequence.
When this LSI shifts to the protection sequence, it is latched to the state at which each function is shut down.
It recovers from the protection sequence by applying to EN pin again or releasing UVLO again.
The protection sequence example is as follows.
In (A) of the following figure, DCDC1 output shorts to GND. However, this LSI doesn't shift to protection sequence
because the term of ground-short is 1 ms or shorter.
In (B) of the following figure, DCDC2 output shorts to GND. After ground-short state continues for 1 ms, this LSI
shifts to protection sequence, DCDC1, DCDC2, external Pch-MOSFET gate drive circuits and BUF shift to OFF
state , and BUF shifts to OFF state after another 1 ms and are latched.
Even if ground-short is released, the operation of each circuit does not recover (C).
During the protection sequence, RESET pin is not set to Low.
In (D) of the following figure, they recover to normal start sequence after EN is input again.
PCNT
BUF
FB1
FB2
DIS
EN
— Any of DCDC1 and DCDC2 shorts to GND. (Output voltage is 50% or lower of target value.)
— TSD circuit detects abnormal state.
1.8 V
1.2 V
0.6 V
3.3 V
< 1 ms
(A)
Ground-short
cancel
operation
Normal
1 ms
(B)
Timer latch
V
1 ms
Protection
operation
IN
Ground-short
release
15
(C)
(D)
3.75 ms
7.5 ms
8.5 ms
Normal operation
(Start sequence)
30 ms
AN30181A
Ver. BEB