Electrical characteristics – Rainbow Electronics MAX1734 User Manual
Page 3
MAX1733/MAX1734
Low-Voltage, Step-Down DC-DC Converters
in SOT23
_______________________________________________________________________________________
3
Note 1: All devices are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
ELECTRICAL CHARACTERISTICS
(V
IN
= +2.7V to +5.5V, SHDN = IN, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
Input Voltage Range
V
IN
2.7
5.5
V
Startup Voltage
V
START
2.0
V
V
IN
rising, 200mV typical hysteresis
1.95
UVLO Threshold
V
UVLO
V
IN
falling
1.55
V
Quiescent Supply Current
I
IN
No switching (FB/OUT above trip point)
70
µA
Shutdown Supply Current
I
SHDN
SHDN = GND
4
µA
Outp ut V ol tag e Range ( MAX 1733) V
OUT
1.25
2.0
V
Output Voltage Accuracy
(MAX1734)
I
OUT
= 0 to 250mA
-3
+3
%
OUT Sense Current (MAX1734)
I
OUT
V
OUT
= V
REG
, V
IN
= V
SHDN
= 5V
8
µA
FB Feedback Threshold
(MAX1733)
V
FB
V
IN
= 3.6V
1.210
1.280
V
FB Leakage Current (MAX1733)
I
FB
V
FB
= 1.5V
0.2
µA
SHDN Input High Voltage
V
IH
2.7V < V
IN
< 5.5V
1.6
V
SHDN Input Low Voltage
V
IL
2.7V < V
IN
< 5.5V
0.4
V
SHDN Leakage Current
I
SHDN
SHDN = GND or IN
1
µA
High-Side Current Limit
I
LIMP
300
565
mA
Low-Side Current Limit
I
LIMN
200
430
mA
I
LX
= -50mA, V
IN
= 3.0V
1.4
High-Side On-Resistance
R
ONP
I
LX
= -50mA, V
IN
= 5.5V
1.1
Ω
I
LX
= -50mA, V
IN
= 3.0V
2
Rectifier On-Resistance
R
ONN
I
LX
= -50mA, V
IN
= 5.5V
1.6
Ω
LX Leakage Current
I
LXLEAK
V
IN
= 5.5V, V
LX
= 0 to V
IN
5
µA
LX Reverse Leakage Current
I
LXLK,R
IN unconnected, V
LX
= 5.5V, SHDN = GND
5
µA
Minimum On-Time
t
ON(MIN)
0.25
0.55
µs
Minimum Off-Time
t
OFF( M IN)
0.25
0.55
µs