High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
MAX1652–MAX1655
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +15V, GND = PGND = 0V, SYNC = REF, IVL = IREF = 0A,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 3)
PARAMETER
3.3V and 5V STEP-DOWN CONTROLLERS
Input Supply Range
5V Output Voltage (CSL)
3.3V Output Voltage (CSL)
0 < (CSH - CSL) < 70mV, FB = VL, 6V < V+ < 30V,
includes line and load regulation
0 < (CSH - CSL) < 70mV, FB = VL, 4.5V < V+ < 30V,
includes line and load regulation
MAX1655
Feedback Voltage
Line Regulation
Current-Limit Voltage
FLYBACK/PWM CONTROLLER
SECFB Regulation Setpoint
Falling edge, hysteresis = 22mV (MAX1652)
Falling edge, hysteresis = 22mV (MAX1654)
SHDN
= 2V, 0 < I
VL
< 25mA, 5.5V < V+ < 30V
Rising edge, hysteresis = 50mV
Rising edge, hysteresis = 60mV
No external load (Note 1)
0 < I
REF
< 100µA
SHDN
= 0V, V+ = 30V, CSL = 0 or 5.5V
FB = CSH = CSL = 5.5V, VL switched over to CSL
2.40
-0.08
4.7
3.75
4.2
2.43
2.60
0.08
5.3
4.05
4.7
2.57
15
10
15
2
SYNC = REF
SYNC = 0 or 5V
250
120
250
250
210
SYNC = REF
SYNC = 0 or 5V
High or low
High or low, BST - LX = 4.5V
97
98
5
5
320
350
180
V
CSH - CSL = 0V, 5V < V+ < 30V,
CSL = FB,
SKIP
= 0V
6V < V+ < 30V
CSH - CSL, positive
CSH - CSL, negative
70
-40
MAX1652/MAX1653/
MAX1654
4.5
4.80
3.16
0.96
2.40
30
5.30
3.50
1.04
2.60
0.06
130
-160
V
V
%/V
mV
V
V
V
CONDITIONS
MIN
TYP
MAX
UNITS
INTERNAL REGULATOR AND REFERENCE
VL Output Voltage
VL Fault Lockout Voltage
VL/CSL Switchover Voltage
Reference Output Voltage
Reference Load Regulation
V+ Shutdown Current
V+ Off-State Leakage Current
Quiescent Power Consumption
OSCILLATOR AND INPUTS/OUTPUTS
Oscillator Frequency
SYNC High Pulse Width
SYNC Low Pulse Width
Oscillator Sync Range
Maximum Duty Cycle
DL On-Resistance
DH On-Resistance
kHz
ns
ns
kHz
%
Ω
Ω
V
V
V
V
mV
µA
µA
mW
Note 3:
Specifications from 0°C to -40°C are guaranteed by design, not production tested.
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
