V

High-Efficiency, PWM, Step-Down

DC-DC Controllers in 16-Pin QSOP

4

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ELECTRICAL CHARACTERISTICS (continued)

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

V

3.16

3.50

3.3V Output Voltage (CSL)

V

4.5

30

Input Supply Range

V

4.80

5.30

5V Output Voltage (CSL)

UNITS

MIN

TYP

MAX

PARAMETER

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)

µA

15

V+ Off-State Leakage Current

µA

10

V+ Shutdown Current

V

Rising edge, hysteresis = 50mV

4.2

4.7

VL/CSL Switchover Voltage

V

2.43

2.57

Reference Output Voltage

Falling edge, hysteresis = 22mV (MAX1652)

Falling edge, hysteresis = 22mV (MAX1654)

mV

15

Reference Load Regulation

V

3.75

4.05

VL Fault Lockout Voltage

V

4.7

5.3

VL Output Voltage

2.40

2.60

V

-0.08

0.08

SECFB Regulation Setpoint

SYNC = REF

SYNC = 0 or 5V

97

kHz

210

320

Oscillator Sync Range

kHz

SYNC = REF

120

180

Oscillator Frequency

ns

250

SYNC High Pulse Width

ns

250

SYNC Low Pulse Width

250

350

mW

2

Quiescent Power Consumption

High or low, BST - LX = 4.5V

High or low

SYNC = 0 or 5V

Ω

5

DH On-Resistance

Ω

5

DL On-Resistance

%

98

Maximum Duty Cycle

CSH - CSL = 0V, 5V < V+ < 30V,

CSL = FB, SKIP = 0V

6V < V+ < 30V

%/V

0.06

Line Regulation

3.3V and 5V STEP-DOWN CONTROLLERS

FLYBACK/PWM CONTROLLER

INTERNAL REGULATOR AND REFERENCE

OSCILLATOR AND INPUTS/OUTPUTS

MAX1652/MAX1653/

MAX1654

MAX1655