MAX16903 Datasheet, PDF (4/13 Pages) Maxim Integrated Products – 2.1MHz, High-Voltage, 1A Mini-Buck Converter Thermal Shutdown Protection

2.1MHz, High-Voltage, 1A Mini-Buck Converter
ELECTRICAL CHARACTERISTICS (continued)
(V_SUP = +14V, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = +25°C, unless otherwise noted.)
PARAMETER
Skip-Mode Peak Current
High-Side DMOS RDS_ON
Low-Side DMOS RDS_ON
DMOS Peak Current-Limit
Threshold
SYMBOL
I_SKIP
R_ON,HS
R_ON,LS
V_BIAS = 5V
I_MAX
CONDITIONS
MIN TYP
350
400
250
1.275 1.5
MAX
800
450
1.75
UNITS
mA
m

m

A
Soft-Start Ramp Time
t_SS
LX Rise Time
t_RISE,LX
Minimum On-Time
t_ON
PWM Switching Frequency
f_SW
Internally generated
SYNC Input Frequency Range
f_SYNC
Spread-Spectrum Range
SS
Spread-spectrum option only
PGOOD
PGOOD Threshold
V_THR,PGD V_OUT rising
V_THF,PGD V_OUT falling
PGOOD Debounce
t_DEB
PGOOD HIGH Leakage Current I_LEAK,PGD T_A = +25°C
PGOOD Output Low Level
V_OUT,PGD Sinking 1mA
LOGIC LEVELS
EN Level
V_IH,EN
V_IL,EN
EN Input Current
I_IN,EN V_EN = V_SUP = +42V, T_A = +25°C
SYNC Switching Threshold
V_IH,SYNC
V_IL,SYNC
SYNC Internal Pulldown
R_PD,SYNC
THERMAL PROTECTION
Thermal Shutdown
T_SHDN
Thermal Shutdown Hysteresis T_SHDN,HYS
Note 2: When the typical minimum on-time of 80ns is violated, the device skips pulses.
Note 3: Guaranteed by design; not production tested.
7
8
9
ms
5
ns
80
ns
1.925 2.1 2.275 MHz
1.8
2.6
MHz
+6
%
93
%
88
91
94
10
μs
1
μA
0.4
V
2.4
V
0.6
1
μA
1.4
V
0.4
200
k

175
°C
15
°C
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