Electrical characteristics (continued), Electrical characteristics – Rainbow Electronics MAX1637 User Manual
Page 3
MAX1637
Miniature, Low-Voltage,
Precision Step-Down Controller
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
CC
= V
GG
= 5V, SYNC = V
CC
, I
REF
= 0mA,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at
T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
CC
= V
GG
= 5V, SYNC = V
CC
, I
REF
= 0mA,
T
A
= -40°C to +85°C
, unless otherwise noted.) (Note 2)
High or low, DH or DL
DH or DL forced to 2V
CSH = CSL = 5V, V
CC
= V
GG
= GND,
either CSH or CSL input
FB to DL delay, 22mV overdrive, C
GATE
= 2000pF
FB, with respect to regulation point
From shutdown or power-on-reset state
Pin at GND or V
CC
SHDN, SKIP, SYNC
% of nominal output
SHDN, SKIP, SYNC
CONDITIONS
Ω
7
Gate Driver On-Resistance
A
1
Gate Driver Sink/Source Current
µA
10
Current-Sense Input Leakage Current
µA
-1
1
Logic Input Bias Current
V
0.8
Logic Input Voltage Low
V
2.4
Logic Input Voltage High
µs
1.25
Overvoltage Fault Propagation Delay
%
4
7
10
Overvoltage Trip Threshold
clocks
6144
Output Undervoltage Lockout Delay
%
60
70
80
Output Undervoltage Lockout Threshold
UNITS
MIN
TYP
MAX
PARAMETER
FB tied to V
OUT
, 0mV < (CSH - CSL) < 80mV,
includes line and load regulation
SYNC = GND
V
CC
, V
GG
SYNC = V
CC
Rising edge, hysteresis = 15mV
Rising edge, hysteresis = 15mV
V
CC
= 3.3V
V
CC
= V
GG
= 3.3V, output not switching
V
CC
= 5V
V
CC
= V
GG
= 5V, output not switching
CSH > CSL
CONDITIONS
kHz
240
340
SYNC Input Frequency Range
ns
200
SYNC Input Rise/Fall Time
ns
200
SYNC Input Pulse Width Low
ns
200
SYNC Input Pulse Width High
kHz
170
230
Oscillator Frequency
262
338
V
2.80
3.05
V
GG
Undervoltage Lockout Threshold
V
2.80
3.05
V
CC
Undervoltage Lockout Threshold
mW
1.75
Power Consumption
mW
2.5
mV
70
130
Current-Limit Threshold
V
1.080
1.120
Output Voltage
V
3.15
5.5
Input Voltage Range
V
REF
3.6
Output Adjustment Range
V
V
REF
5.5
UNITS
MIN
TYP
MAX
PARAMETER
OVERVOLTAGE PROTECTION
INPUTS AND OUTPUTS
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