Datasheet

MAX17502 60V, 1A, Ultra-Small, High-Efciency,
Synchronous Step-Down DC-DC Converter
www.maximintegrated.com
Maxim Integrated │ 3
Electrical Characteristics (continued)
(V
IN
= 24V, V
GND
= V
PGND
= 0V, C
VIN
=2.2μF,C
VCC
=1μF,V
EN
= 1.5V, C
SS
= 3300pF, V
FB
= 0.98 x V
OUT
, LX = unconnected,
RESET = unconnected. T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C. All voltages are refer-
encedtoGND,unlessotherwisenoted.)(Note2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER MOSFETs
High-SidepMOSOn-Resistance R
DS-ONH
I
LX
= 0.5A
(sourcing)
T
A
= +25°C 0.55 0.85
Ω
T
A
= T
J
= +125°C
(Note 3)
1.2
Low-SidenMOSOn-Resistance R
DS-ONL
I
LX
= 0.5A
(sinking)
T
A
= +25°C 0.2 0.35
Ω
T
A
= T
J
= +125°C
(Note 3)
0.47
LX Leakage Current I
LX_LKG
V
EN
= 0V, T
A
= +25°C,
V
LX
= (V
PGND
+ 1V) to (V
IN
- 1V)
1 µA
SOFT-START (SS)
Charging Current I
SS
V
SS
= 0.5V 4.7 5 5.3 µA
FEEDBACK (FB/VO)
FBRegulationVoltage V
FB_REG
MAX17501G/H 0.884 0.9 0.916 V
FBInputBiasCurrent I
FB
T
A
= +25NC
MAX17502E, V
FB
=
3.3V
6.8 12 17
µA
MAX17502F, V
FB
= 5V
6.8 12 17
MAX17502G/H,V
FB
= 0.9V
100 nA
OUTPUT VOLTAGE (V
OUT
)
OutputVoltageRange V
OUT
MAX17502E 3.248 3.3 3.352
V
MAX17502F 4.922 5 5.08
MAX17502G 0.9
0.92 x
V
IN
MAX17502H 0.9
0.965
x V
IN
TRANSCONDUCTANCE AMPLIFIER (COMP)
Transconductance G
M
I
COMP
= ±2.5µA,MAX17502G/H 510 590 650 µS
COMP Source Current I
COMP_SRC
MAX17502G/H 19 32 55 µA
COMP Sink Current I
COMP_SINK
MAX17502G/H 19 32 55 µA
Current-Sense Transresistance R
CS
MAX17502G/H 0.45 0.5 0.55 V/A