800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= V
POUT
= V
INL
= V
ONA
= V
ONL
= 3.6V, CLK/SEL = FBL = ONB= TRACK = PGND = GND, ISET = REF (bypassed with
0.22礔), LX = open, OUTL = open (bypassed with 4.7礔), T
A
= 0癈 to +85癈, unless otherwise noted. Typical values are at
T
A
= +25癈.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC-DC SWITCHES
POUT Leakage Current
V
LX
= 0V, V
OUT
= 5.5V
0.1 10 礎
LX Leakage Current
V
LX
= V
OUT
= V
ONB
= 5.5V, ONA = GND
0.1 10 礎
N-channel
0.17 0.28
Switch On-Resistance
P-channel
0.22 0.5
?/DIV>
N -
C hannel
C
ur r
ent Li m i t ( N
ote 4) I
LIM
V
ISET
= 1.25V, CLK/SEL = GND or OUT
1000 1250 1600 mA
P-Channel Turn-Off Current
CLK/SEL = GND
10 50 120 mA
REFERENCE
Reference Output Voltage
V
REF
I
REF
= 0A
1.230 1.250 1.270 V
Reference Load Regulation
-1礎 < I
REF
< 50礎
5 15 mV
Reference Supply Regulation
2.5V < V
OUT
< 5.5V
0.2 5 mV
LINEAR REGULATOR
INL Voltage Range
(Note 1)
2.3 5.5 V
INL Startup Voltage
V
INL
V
OUT
= 2V, rising edge only
2.15 2.30 2.45 V
Output Voltage in Internal
Feedback Mode
FBL = GND, I
OUTL
= 10mA
2.80 2.85 2.90 V
FBL Dual-Mode Threshold
150 250 350 mV
FBL Regulation Voltage
V
FBL
FBL = OUTL, I
OUTL
= 10mA, I
REF
= 0A
1.230 1.250 1.270 V
FBL Input Leakage Current
V
FBL
= 1.5V
0.01 50 nA
OUTL Adjust Range
1.25
5 V
Short-Circuit Current Limit
V
FBL
= 1V
550
1300 mA
Dropout Resistance
V
FBL
= 1V, I
OUTL
= 500mA
0.25 0.5 ?/DIV>
Load Regulation
1mA < I
OUTL
< 500mA, FBL = GND
0.5 1 %
Line Regulation
2.5V < (V
OUT
= V
INL
= V
POUT
) < 5.5V,
FBL = OUTL
-0.5
0.5 %
INL Supply Current in Shutdown
OUTL = ONA = ONL = GND
0.1 10 礎
INL No-Load Supply Current
I
OUTL
= 0A, V
INL
= 5.5V
90 250 礎
AC Power-Supply Rejection
f = 10kHz
65
dB
Thermal Shutdown
Hysteresis approximately 10癈
160
癈
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