MP2317 – 26V, 1A, SYNCHRONOUS, STEP-DOWN CONVERTER
MP2317 Rev. 1.0 www.MonolithicPower.com 4
3/24/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
J
= -40°C to 125°C
(5)
, unless otherwise noted. Typical value is based on the average
value when T
J
= 25°C.
Parameter Symbol Condition Min Typ Max Units
Supply current (quiescent) I
V
FB
= 1V 150 A
HS switch-on resistance HS
RDS-ON
V
BST-SW
= 4V 100 m
LS switch-on resistance LS
RDS-ON
VCC = 4V 50 m
Switch leakage SW
LKG
1 A
Current limit I
LIMIT
Duty cycle = 40%, T
J
= 25°C 1.4 2.2 3 A
Oscillator frequency f
SW
V
FB
= 750mV 500 600 700 kHz
Foldback frequency f
FB
V
FB
= 200mV 0.2 f
SW
Maximum duty cycle D
MAX
V
FB
= 750mV 93 %
Minimum on time
T
ON MIN
90 ns
Feedback voltage V
FB
775 791 807 mV
Feedback current I
FB
V
FB
= 820mV 10 50 nA
V
IN
under-voltage lockout
threshold rising
INUV
Vth
5.2
6.3 7.5 V
V
IN
under-voltage lockout
threshold hysteresis
INUV
HYS
500 mV
VCC regulator V
CC
4 V
VCC load regulation I
CC
= 5mA 1.5 %
Soft-start period T
SS
10% to 90% 0.8 1.5 2.2 ms
Thermal shutdown
(6)
T
SD
150 °C
Thermal hysteresis
T
SD HYS
20 °C
NOTES:
5) Not tested in production and guaranteed by over-temperature correlation.
6) Guaranteed by design and characterization test.
