Datasheet

ADP5050 Data Sheet
Rev. 0 | Page 8 of 60
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
CHANNEL 4 SYNC BUCK REGULATOR
FB4 Pin
Fixed Output Options V
OUT4
2.5 5.5 V Fuse trim or I
2
C interface
(5-bit value)
Adjustable Feedback Voltage V
FB4
0.800 V
Feedback Voltage Accuracy V
FB4(DE FAULT )
−0.55 +0.55 % T
J
= 25°C
−1.25 +1.0 % 0°C ≤ T
J
≤ 85°C
−1.5 +1.5 % −40°C ≤ T
J
≤ +125°C
Feedback Bias Current I
FB4
0.1 µA
SW4 Pin
High-Side Power FET
On Resistance
R
DSON(4H)
225
mΩ
Pin-to-pin measurement
Low-Side Power FET
On Resistance
R
DSON(4L)
150 mΩ Pin-to-pin measurement
Current-Limit Threshold I
TH(ILIM4)
1.7 2.2 2.55 A
Minimum On Time t
MIN_ON4
90 120 ns f
SW
= 250 kHz to 1.4 MHz
Minimum Off Time t
MIN_OFF4
1/9 × t
SW
ns f
SW
= 250 kHz to 1.4 MHz
Error Amplifier (EA), COMP4 Pin
EA Transconductance g
m4
310 470 620 µS
Soft Start
Soft Start Time
t
SS4
2.0
ms
SS34 connected to VREG
Programmable Soft Start Range
2.0
8.0
ms
Hiccup Time t
HICCUP4
7 × t
SS4
ms
C
OUT
Discharge Switch On Resistance R
DIS4
250 Ω
LDO REGULATOR SPECIFICATIONS
V
IN5
= (VOUT5 + 0.5 V) or 1.7 V (whichever is greater) to 5.5 V; C
IN
= C
OUT
= 1 µF; T
J
= −40°C to +125°C for minimum and maximum
specifications, and T
A
= 25°C for typical specifications, unless otherwise noted.
Table 3.
Parameter Min Typ Max Unit Test Conditions/Comments
INPUT SUPPLY VOLTAGE RANGE 1.7 5.5 V PVIN5 pin
OPERATIONAL SUPPLY CURRENT
Bias Current for LDO Regulator 30 130 µA I
OUT5
= 200 µA
60 170 µA I
OUT5
= 10 mA
145 320 µA I
OUT5
= 200 mA
VOLTAGE FEEDBACK (FB5 PIN)
Adjustable Feedback Voltage 0.500 V
Feedback Voltage Accuracy −1.0 +1.0 % T
J
= 25°C
−1.6
+1.6
%
0°C ≤ T
J
≤ 85°C
−2.0 +2.0 % −40°C ≤ T
J
≤ +125°C
DROPOUT VOLTAGE
I
OUT5
= 200 mA
80
mV
VOUT5 = 3.3 V
100 mV VOUT5 = 2.5 V
180 mV VOUT5 = 1.5 V
CURRENT-LIMIT THRESHOLD 250 510 mA Specified from the output voltage drop
to 90% of the specified typical value
OUTPUT NOISE
92
µV rms
10 Hz to 100 kHz, V
PVIN5
= 5 V, VOUT5 = 1.8 V
POWER SUPPLY REJECTION RATIO V
PVIN5
= 5 V, VOUT5 = 1.8 V, I
OUT5
= 1 mA
77 dB 10 kHz
66 dB 100 kHz