Rainbow Electronics MAX5093 - Manual (Page 3)

MAX5092/MAX5093
4V to 72V Input LDOs with Boost Preregulator
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Boost Internal Switch Maximum
On-Time
t ON-MAX 1.80 2.25 2.70 µs
Internal Switch Current Limit I LIM Measured in steady-state condition 1.5 3.0 A
Boost Turn-On Response Time
Time from V BSOUT falling below regulation
to switch on-time
2 5 µs
Internal Diode Forward Voltage
Drop
V F MAX5092_ only, I F = 1A 0.95 V
LDO
Guaranteed Output Current I OUT V BSOUT - V OUT = 2V (Note 5) 250 mA
I OUT = 1mA 3.25 3.3 3.35
SET = SGND,
MAX5092A/
MAX5093A
100µA ≤ I
OUT
≤ 250mA 3.2 3.3 3.4
I OUT = 1mA 4.900 5 5.075
Output Voltage V OUT
SET = SGND,
MAX5092B/
MAX5093B
100µA ≤ I
OUT
≤ 250mA 4.85 5 5.10
V
Minimum Adjustable Output
Voltage
V ADJMIN Boost operation, V IN = 4V, V BSOUT = 7V 1.5 V
MAX5092_,
V
BSOUT = 11V
9
Maximum Adjustable Output
Voltage
V ADJMAX
Boost operation,
V
IN = 4V MAX5093_,
V
BSOUT = 12V
10
V
Adjustable Output Voltage V ADJ
LDO operation, V IN
≥ V
BST_DIS
(boost converter off) (Note 6)
1.5 10.0 V
Dropout Voltage ∆V
DO I OUT = 250mA (Note 7) 0.9 1.6 V
LDO Startup Response Time
Rising edge of V BSOUT to the rising edge of
V
OUT
, R
L
= 500 Ω, SET = SGND
200 µs
MAX5092A/MAX5093A 0.4 7V ≤ V
IN
≤ 72V,
I LOAD = 10mA MAX5092B/MAX5093B 0.5 Line Regulation
∆V
OUT /
∆V
IN
7V ≤ V
IN
≤ 28V, I
LOAD = 250mA 1.6
mV/V
SET Reference Voltage V SET 1.205 1.235 1.265 V
SET Input Bias Current I SET 0.5 100 nA
Load Regulation
∆V
OUT /
∆I
OUT
I OUT = 1mA to 250mA 0.2 0.6 mV/mA
f = 100Hz
I OUT = 10mA, V BSOUT(AC)
= 500mV P-P , V OUT = 5V
80
Power-Supply Rejection Ratio PSRR
f = 1MHz
I OUT = 10mA, V BSOUT(AC)
= 500mV P-P , V OUT = 5V
60
dB
Short-Circuit Current I SC 255 490 mA
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V EN = 14V, I OUT = 1mA, C IN = 47µF, C BSOUT = 22µF, C OUT = 10µF, C VL = 1µF, T A = T J = -40°C to +125°C, unless otherwise
noted. See Figures 4–7 as applicable. Typical specifications are at T A = +25°C.) (Note 2)