Datasheet

MAX17501 60V, 500mA, 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
= 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 referenced 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
MAX17501A/E, V
FB
= 3.3V
6.8 12 17
µA
MAX17501B/F,V
FB
= 5V
6.8 12 17
MAX17501G/H,V
FB
= 0.9V
100 nA
OUTPUT VOLTAGE (V
OUT
)
Output Voltage Accuracy V
OUT
MAX17501A 3.248 3.380 3.448
V
MAX17501B 4.922 5.121 5.225
MAX17501E 3.248 3.3 3.352
MAX17501F 4.922 5 5.08
TRANSCONDUCTANCE AMPLIFIER (COMP)
Transconductance G
M
I
COMP
= ±2.5µA,MAX17501G/H 510 590 650 µS
COMP Source Current I
COMP_SRC
MAX17501G/H 19 32 55 µA
COMP Sink Current I
COMP_SINK
MAX17501G/H 19 32 55 µA
Current-Sense Transresistance R
CS
MAX17501G/H 0.9 1 1.1 V/A
CURRENT LIMIT
Peak Current-Limit Threshold I
PEAK-LIMIT
0.64 0.76 0.86 A
RunawayCurrent-LimitThreshold
I
RUNAWAY-
LIMIT
0.65 0.78 0.905 A
Sink Current-Limit Threshold I
SINK-LIMIT
MAX17501A/B 0.03
A
MAX17501E/F/G/H 0.3 0.35 0.4
PFM Current-Limit Threshold I
PFM
MAX17501A/B 0.125 A