LM27761
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ZHCSEO7C –OCTOBER 2015–REVISED JANUARY 2017
6.5 Electrical Characteristics
Typical limits apply for TA = 25°C, and minimum and maximum limits apply over the full temperature range. Unless otherwise
specified, VIN = 5 V and values for C1 to C4 are as shown in the 典型应用.
PARAMETER
Supply current
TEST CONDITIONS
Open circuit, no load
MIN
TYP
370
7
MAX
600
12
UNIT
µA
Iq
ISD
Shutdown supply current
Switching frequency
µA
ƒSW
RNEG
VDO
PSRR
VN
VIN = 3.6 V
1.7
2
2.3
MHz
Ω
Output resistance to CPOUT
LDO dropout voltage
VIN = 5.5 V
2
ILOAD = 100 mA, VOUT = −5 V
ILOAD = 80 mA, VCPOUT = −5 V
ILOAD = 80 mA, 10 Hz to 100 kHz
30
35
20
1.22
mV
dB
Power supply rejection ratio
Output noise voltage
µVRMS
V
VFB
VOUT
Feedback pin reference voltage
Adjustable output voltage
Load regulation
1.202
–5
1.238
–1.5
5.5 V ≥ VIN ≥ 2.7 V
0 to 250 mA, VOUT = −1.8 V
5.5 V ≥ VIN ≥ 2.7 V, ILOAD = 50 mA
5.5 V ≥ VIN ≥ 2.7 V
5.5 V ≥ VIN ≥ 2.7 V
VIN falling
V
4.6
1.5
µV/mA
mV/V
V
Line regulation
VIH
VIL
Enable pin input voltage high
Enable pin input voltage low
1.2
0.4
V
2.6
2.4
UVLO
Undervoltage lockout
V
VIN rising
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