MAX17530 datasheet(4/20 Pages) MAXIM

4 / 20 page

(VIN = 24V, VGND = 0V, VOUT = 3.3V, VFB = 0.85V, VEN/UVLO = 1.5V, RT/SYNC = 191kΩ, LX = SS = MODE = RESET = unconnected;

TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to GND, unless otherwise

noted.) (Note 2)

Note 2: All electrical specifications are 100% production tested at TA = +25°C. Specifications over the operating temperature range

are guaranteed by design and characterization.

Note 3: Actual IQ-PFM in the application circuit is higher due to additional current in the output voltage feedback resistor divider. For

example, IQ-PFM (MODE = unconnected) = 26µA for Figure 6, 22µA for Figure 7, and 78µA for Figure 11.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Switching-Frequency Adjustable

Range

See the Switching Frequency

(RT/SYNC) section for details

100

2200

kHz

SYNC Input Frequency

1.1 x fSW

2200

kHz

SYNC Pulse Minimum Off-Time

SYNC Rising Threshold

VSYNC-H

1.22

1.44

Hysteresis

VSYNC-HYS

0.115

0.18

0.265

Number of SYNC Pulses to

Enable Synchronization

Cycles

TIMING

Minimum On-Time

tON-MIN

128

Maximum Duty Cycle

DMAX

fSW ≤ 600kHz,

VFB = 0.98 x VFB-REG

fSW > 600kHz,

VFB = 0.98 x VFB-REG

Hiccup Timeout

RESET

FB Threshold for RESET Rising

VFB-OKR

VFB rising

FB Threshold for RESET Falling

VFB-OKF

VFB falling

RESET

Delay after FB Reaches

95% Regulation

2.1

RESET

Output Level Low

IRESET = 1mA

0.23

RESET

Output Leakage Current

VFB = 1.01 x VFB-REG, TA = +25°C

µA

MODE

MODE PFM Threshold

VMODE-PFM

1.22

1.44

MODE Hysteresis

VMODE-HYS

0.19

MODE Internal Pullup Resistor

RMODE

VMODE = unconnected

123

kΩ

VMODE = GND

1390

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

VMODE-PFM

Temperature rising

160

°C

Thermal-Shutdown Hysteresis

VMODE-HYS

°C

MAX17530

4V to 42V, 25mA, Ultra-Small, High-Efficiency

Synchronous Step-Down DC-DC Converter

with 22µA No-Load Supply Current

www.maximintegrated.com

Maxim Integrated │ 4

Electrical Characteristics (continued)

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