Datasheet

MAX5088/MAX5089
2.2MHz, 2A Buck Converters with an
Integrated High-Side Switch
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V+ = V
L
= 5V or V+ = 5.5V to 23V, V
EN
= 5V, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Circuits of Figures 5 and 6. Typical
values are at T
A
= T
J
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
SYNC Frequency Range
(Note 3)
f
SYNC
200 2200
kHz
Sync Input to SOURCE Rising-
Edge Phase Delay (Note 4)
SYNC
PHASE
R
OSC
= 10kΩ, f
SYNC
= 1.2MHz 65
degrees
Clock Output Phase Delay With
Respect to SOURCE Waveform
(Note 5)
CKO
PHASE
R
OSC
= 10kΩ, SYNC = GND
(MAX5088 only)
115
degrees
SYNC High Threshold V
SYNCH
2.0 V
SYNC Low Threshold V
SYNCL
0.8 V
Minimum SYNC High Pulse Width
t
SYNC_H
100
ns
EN, RESET (MAX5088)/PGOOD (MAX5089)
V
IH
2.0
EN Threshold
V
IL
0.8
V
EN Input Bias Current I
EN
250 nA
RESET Threshold (Note 6) V
TH
V
FB
= V
OUT
90
92.5
95
% V
OUT
PGOOD Threshold (Note 6) V
TH
V
FB
= V
OUT
90
92.5
95
% V
OUT
FB to RESET or FB to PGOOD
Propagation Delay
t
FD
3µs
RESET Active Timeout Period t
RP
140 200
254
ms
RESET, PGOOD Output Voltage V
OL
I
SINK
= 3mA 0.4 V
RESET, PGOOD Output Leakage
Current
I
LEAK
V+ = V
L
= 5.2V, V
RESET
or
V
PGOOD
= 6V, V
FB
= 0.8V
2µA
THERMAL SHUTDOWN
Thermal Shutdown T
SHDN
Temperature rising
+170
°C
Thermal-Shutdown Hysteresis 25 °C
Note 1: 100% tested at +125°C. Limits over temperature are guaranteed by design.
Note 2: Output current may be limited by the power dissipation of the package. See the Power Dissipation section in the Applications
Information section.
Note 3: SYNC input frequency is equal to the switching frequency.
Note 4: From the SYNC rising edge to SOURCE rising edge.
Note 5: From the rising edge of the SOURCE waveform to the rising edge of the CKO waveform.
Note 6: RESET goes high 200ms after V
OUT
crosses this threshold, PGOOD goes high after V
OUT
crosses this threshold.