Datasheet

ADP7182 Data Sheet
Rev. C | Page 4 of 28
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
POWER SUPPLY REJECTION RATIO PSRR 1 MHz, V
IN
= −4.3 V, V
OUT
= −3 V 45 dB
1 MHz, V
IN
= −6 V, V
OUT
= −5 V 32 dB
100 kHz, V
IN
= −4.3 V, V
OUT
= −3 V 45 dB
100 kHz, V
IN
= −6 V, V
OUT
= −5 V 45 dB
10 kHz, V
IN
= −4.3 V, V
OUT
= −3 V
66
dB
10 kHz, V
IN
= −6 V, V
OUT
= −5 V 66 dB
1 MHz, V
IN
= −16 V, V
OUT
= −15 V, adjustable mode,
C
NR
= 100 nF, R
NR
= 13 kΩ, R
FB1
= 13 kΩ, R
FB2
= 147 kΩ
45 dB
100 kHz, V
IN
= −16 V, V
OUT
= −15 V, adjustable mode,
C
NR
= 100 nF, R
NR
= 13 kΩ, R
FB1
= 13 kΩ, R
FB2
= 147 kΩ
45 dB
10 kHz, V
IN
= −16 V, V
OUT
= −15 V, adjustable mode,
C
NR
= 100 nF, R
NR
= 13 kΩ, R
FB1
= 13 kΩ, R
FB2
= 147 kΩ
66 dB
1
Based on an endpoint calculation using −1 mA and −200 mA loads. See Figure 8 for the typical load regulation performance for loads less than 1 mA.
2
Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output
voltages below −3 V.
3
Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value.
4
Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a −5 V
output voltage is defined as the current that causes the output voltage to drop to 90% of −5 V, or −4.5 V.
INPUT AND OUTPUT CAPACITANCE, RECOMMENDED SPECIFICATIONS
Table 2.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT AND OUTPUT CAPACITANCE
Minimum Capacitance
1
C
MIN
T
A
= −40°C to +125°C 1.5 2.2 µF
Capacitor Effective Series Resistance (ESR) R
ESR
T
A
= −40°C to +125°C 0.001 0.2 Ω
1
The minimum input and output capacitance must be greater than 1.5 µF over the full range of operating conditions. The full range of operating conditions in the
application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R and X5R type capacitors are recommended;
Y5V and Z5U capacitors are not recommended for use with any LDO.