V
MAX1652–MAX1655
High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +15V, GND = PGND = 0V, SYNC = REF, I
VL
= I
REF
= 0A, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 3)
Note 3: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
0 < (CSH - CSL) < 70mV, FB = VL, 4.5V < V+ < 30V,
includes line and load regulation
0 < (CSH - CSL) < 70mV, FB = VL, 6V < V+ < 30V,
includes line and load regulation
CONDITIONS
V3.16 3.503.3V Output Voltage (CSL)
V4.5 30Input Supply Range
V4.80 5.305V Output Voltage (CSL)
UNITSMIN TYP MAXPARAMETER
CSH - CSL, negative
CSH - CSL, positive
-40 -160
Current-Limit Voltage
V
0.96 1.04
Feedback Voltage
2.40 2.60
mV
70 130
FB = CSH = CSL = 5.5V, VL switched over to CSL
SHDN = 0V, V+ = 30V, CSL = 0 or 5.5V
Rising edge, hysteresis = 60mV
No external load (Note 1)
0 < I
REF
< 100µA
µA15V+ Off-State Leakage Current
µA10V+ Shutdown Current
V
Rising edge, hysteresis = 50mV
SHDN = 2V, 0 < I
VL
< 25mA, 5.5V < V+ < 30V
4.2 4.7VL/CSL Switchover Voltage
V2.43 2.57Reference Output Voltage
Falling edge, hysteresis = 22mV (MAX1652)
Falling edge, hysteresis = 22mV (MAX1654)
mV15Reference Load Regulation
V3.75 4.05VL Fault Lockout Voltage
V4.7 5.3VL Output Voltage
2.40 2.60
V
-0.08 0.08
SECFB Regulation Setpoint
SYNC = REF
SYNC = 0 or 5V
97
kHz210 320Oscillator Sync Range
kHz
SYNC = REF
120 180
Oscillator Frequency
ns250SYNC High Pulse Width
ns250SYNC Low Pulse Width
250 350
mW2Quiescent Power Consumption
High or low, BST - LX = 4.5V
High or low
SYNC = 0 or 5V
Ω5DH On-Resistance
Ω5DL On-Resistance
%
98
Maximum Duty Cycle
CSH - CSL = 0V, 5V < V+ < 30V,
CSL = FB, SKIP = 0V
6V < V+ < 30V %/V0.06Line Regulation
3.3V and 5V STEP-DOWN CONTROLLERS
FLYBACK/PWM CONTROLLER
INTERNAL REGULATOR AND REFERENCE
OSCILLATOR AND INPUTS/OUTPUTS
MAX1652/MAX1653/
MAX1654
MAX1655
