ADP1875 Analog Devices, ADP1875 Datasheet - Page 4

• Manufacturer Part Number: ADP1875
• Description: Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Saving Mode
• Manufacturer: Analog Devices

ADP1874/ADP1875
Parameter
OUTPUT DRIVER CHARACTERISTICS
PRECISION ENABLE THRESHOLD
COMP VOLTAGE
THERMAL SHUTDOWN
CURRENT LIMIT
OVERVOLTAGE AND POWER GOOD
ADP1874ARQZ-0.6/
ADP1874ARQZ-1.0/
High-Side Driver
Low-Side Driver
Propagation Delays
SW Leakage Current
Integrated Rectifier
Logic High Level
Enable Hysteresis
COMP Clamp Low Voltage
COMP Clamp High Voltage
COMP Zero Current Threshold
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Hiccup Current Limit Timing
THRESHOLDS
FB Power Good Threshold
FB Power Good Hysteresis
FB Overvoltage Threshold
FB Overvoltage Hysteresis
PGOOD Low Voltage During Sink
PGOOD Leakage Current
ADP1875ARQZ-0.6 (600 kHz)
On-Time
Minimum On-Time
Minimum Off-Time
ADP1875ARQZ-1.0 (1.0 MHz)
On-Time
Minimum On-Time
Minimum Off-Time
Output Source Resistance
Output Sink Resistance
Rise Time
Fall Time
Output Source Resistance
Output Sink Resistance
Rise Time
Fall Time
DRVL Fall to DRVH Rise
DRVH Fall to DRVL Rise
Channel Impedance
3
3
3
3
3
3
2
2
2
2
Symbol
t
t
t
t
t
t
I
V
V
V
T
PGOOD
FB
FB
V
SWLEAK
r, DRVH
f, DRVH
r,DRVL
f,DRVL
tpdhDRVH
tpdhDRVL
TMSD
COMP(LOW)
COMP(HIGH)
COMP_ZCT
PGOOD
PGD
OV
Test Conditions/Comments
VIN = 5 V, V
VIN = 20 V, V
65% duty cycle (maximum)
VIN = 5 V, V
VIN = 20 V
45% duty cycle (maximum)
I
I
BST − SW = 4.4 V, C
BST − SW = 4.4 V, C
I
I
VREG = 5.0 V, C
VREG = 5.0 V, C
BST − SW = 4.4 V (see Figure 59)
BST − SW = 4.4 V (see Figure 60)
BST = 25 V, SW = 20 V, VREG = 5 V
I
VIN = 2.9 V to 20 V, VREG = 2.75 V to 5.5 V
VIN = 2.9 V to 20 V, VREG = 2.75 V to 5.5 V
Tie EN pin to VREG to enable device
(2.75 V ≤ VREG ≤ 5.5 V)
(2.75 V ≤ VREG ≤ 5.5 V)
(2.75 V ≤ VREG ≤ 5.5 V)
Rising temperature
COMP = 2.4 V
V
V
I
PGOOD = 5 V
SOURCE
SINK
SOURCE
SINK
SINK
PGOOD
FB
FB
rising during system power-up
rising during overvoltage event, I
= 1.5 A, 100 ns, negative pulse (5 V to 0 V)
= 1.5 A, 100 ns, negative pulse (5 V to 0 V)
= 10 mA
= 1 mA
= 1.5 A, 100 ns, positive pulse (0 V to 5 V)
= 1.5 A, 100 ns, positive pulse (0 V to 5 V)
Rev. 0 | Page 4 of 44
OUT
OUT
OUT
= 2 V, T
= 2 V, T
IN
IN
= 0.8 V
= 4.3 nF (see Figure 60)
= 4.3 nF (see Figure 59)
IN
IN
= 4.3 nF (see Figure 59)
= 4.3 nF (see Figure 60)
J
J
= 25°C
= 25°C
PGOOD
= 1 mA
Min
500
285
605
0.47
Typ
600
540
82
340
1.0
312
52
340
2.25
0.70
25
11
1.6
0.7
18
16
15.4
18
22
634
31
1.15
155
15
6
542
30
691
30
143
1
Max
580
110
400
340
85
400
3
1
2.2
1
110
663
2.55
566
710
200
400
Unit
kHz
ns
ns
ns
MHz
ns
ns
ns
Ω
Ω
ns
ns
Ω
Ω
ns
ns
ns
ns
μA
Ω
mV
mV
V
V
V
°C
°C
ms
mV
mV
mV
mV
mV
nA