Datasheet

MAX5088/MAX5089
2.2MHz, 2A Buck Converters with an
Integrated High-Side Switch
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V+ to PGND............................................................-0.3V to +25V
BST/VDD, DRAIN to SGND ....................................-0.3V to +30V
SGND to PGND .....................................................-0.3V to +0.3V
BST/VDD to SOURCE...............................................-0.3V to +6V
SOURCE to SGND..................................................-0.6V to +25V
SOURCE or DRAIN Maximum Peak Current...............5A for 1ms
V
L
to SGND ................-0.3V to the lower of +6V and (V+ + 0.3V)
SYNC, EN, DL, CKO, OSC, COMP,
FB to SGND...............................................-0.3V to (V
L
+ 0.3V)
BYPASS, CKO, OSC, COMP, FB, EN, SYNC, RESET,
PGOOD Maximum Input Current .................................±50mA
RESET, PGOOD to SGND ........................................-0.3V to +6V
BYPASS to SGND..................................................-0.3V to +2.2V
V
L
and BYPASS Short-Circuit Duration to SGND ......Continuous
Continuous Power Dissipation* (T
A
= +70°C)
16-Pin TQFN (derate 33mW/°C above +70°C) ..........2666mW
Package Thermal Resistance (junction to case) ............1.7°C/W
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature Range ............................-65°C to +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
*As per JEDEC51 Standard (multilayer board).
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
SYSTEM SPECIFICATIONS
5.5
23.0
V
Input Voltage Range V+
V+ = V
L
4.5 5.5 V
V+ Operating Supply Current I
Q
V+ = 12V, V
FB
= 0.8V
R
OSC
= 10kΩ, no switching
1.8 2.5 mA
V+ Standby Supply Current I
STBY
V+ = 12V, V
EN
= 0V, PGOOD (MAX5089),
RESET, CKO unconnected (MAX5088),
R
OSC
= 10kΩ
1 1.4 mA
Nonsynchronous (MAX5088),
f
SW
= 1.25MHz, V+ = 12V, I
OUT
= 1.5A,
V
OUT
= 3.3V
79
Efficiency η
Synchronous (MAX5089),
f
SW
= 300kHz, V+ = 12V, I
OUT
= 1.5A,
V
OUT
= 3.3V
90
%
V
L
REGULATOR (V
L
)/BYPASS OUTPUT (BYPASS)
V
L
Undervoltage Lockout V
UVLO
V
L
falling 4.1 4.3 V
V
L
Undervoltage Lockout
Hysteresis
V
HYST
137
mV
V
L
Output Voltage V
L
V+ = 5.5V to 23V, I
VL
= 0 to 40mA 5.0 5.2 5.5 V
BYPASS Output Voltage
V
BYPASS
V+ = V
L
= 5.2V
1.98
2
2.02
V
BYPASS Load Regulation
∆V
BYPASS
I
BYPASS
steps from 0 to 50µA,
V+ = V
L
= 5.2V
0 1.2 10 mV