ADP1755ACPZ-R7 Analog Devices Inc, ADP1755ACPZ-R7 Datasheet - Page 13

• Manufacturer Part Number: ADP1755ACPZ-R7
• Description: IC ADJ LDO REG 0.75V TO 3V 1.2A LFCSP-16
• Manufacturer: Analog Devices Inc

Specifications of ADP1755ACPZ-R7

• Primary Input Voltage: 3.6V
• Output Voltage Adjustable Range: 0.75V To 3V
• Dropout Voltage Vdo: 200mV
• No. Of Pins: 16
• Output Current: 1.2A
• Operating Temperature Range: -40°C To +125°C
• Package / Case: 16-LFCSP
• Mounting Type: Surface Mount
• Current - Output: 1.2A (Max)
• Voltage - Output: 0.75 ~ 3 V
• Voltage - Input: 1.6 ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Regulator Topology: Positive Adjustable
• Voltage - Dropout (typical): 0.105V @ 1.2A
• Number Of Regulators: 1
• Current - Limit (min): 1.5A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 31. Typical PG Behavior vs. V
1
2 2
1
2 2
Figure 30. Typical PG Behavior vs. V
CH1
CH3
CH1
CH3
V
C
OUT
IN
1V/DIV
1V/DIV
1.0V
1.0V
1.0V
1.0V
V
V
= C
IN
IN
= 1.5V
OUT
B
B
B
B
W
W
W
W
= 4.7µF
CH2 500mV
CH2 500mV
500mV/DIV
V
OUT
B
B
T
T
W
W
500mV/DIV
M40.0µs
M40.0µs
V
T
T
OUT
OUT
OUT
1V/DIV
1V/DIV
50.40%
50.40%
, V
PG
PG
, V
IN
IN
V
C
Falling (V
Rising (V
OUT
IN
A CH3
A CH3
= C
= 1.5V
OUT
OUT
OUT
= 4.7µF
900mV
900mV
= 1.5 V)
= 1.5 V)
Rev. B | Page 13 of 20
REVERSE CURRENT PROTECTION FEATURE
The ADP1754/ADP1755 have additional circuitry to protect
against reverse current flow from VOUT to VIN. For a typical
LDO with a PMOS pass device, there is an intrinsic body diode
between VIN and VOUT. When V
diode is reverse-biased. If V
diode becomes forward-biased and conducts current from VOUT
to VIN, potentially causing destructive power dissipation. The
reverse current protection circuitry detects when V
than V
tion, reverse-biasing the diode. The gate of the PMOS pass
device is also connected to VOUT, keeping the device off.
Figure 32 shows a plot of the reverse current vs. the V
differential.
4000
3500
3000
2500
2000
1500
1000
500
0
IN
0
and reverses the direction of the intrinsic diode connec-
0.3
0.6
Figure 32. Reverse Current vs. V
0.9
1.2
V
1.5
OUT
OUT
1.8
– V
is greater than V
IN
2.1
ADP1754/ADP1755
(V)
IN
is greater than V
2.4
2.7
OUT
− V
3.0
IN
IN
OUT
3.3
, the intrinsic
is greater
OUT
3.6
OUT
, this
to V
IN