MIC23099 Datasheet, PDF (7/26 Pages) Micrel Semiconductor – Single AA/AAA Cell Step-Up/Step-Down Regulators

Micrel, Inc.
MIC23099
Electrical Characteristics⁽⁷⁾ (Continued)
VIN = VEN = +1.25V; VOUT1 = +1.8V; VOUT2 = 1.0V; LOUT1 = 6.8µH; LOUT2 = 4.7µH; COUT1 = 47µF; COUT2 = 10µF; TA = 25°C, unless
otherwise noted. Bold values indicate –40°C ≤ TJ ≤ +125°C.
Parameter
Test Conditions
Min. Typ. Max.
Units
Buck
Buck Reference (FB2)
Feedback Regulation Voltage
FB Bias Current
Soft-Start Time
Buck Internal MOSFETs
Vout1 = 1.8V to 3.3V
IOUT2 = 6mA to 30mA; (±3.5%)
VFB2 = 0.6V
VOUT2: 10% to 90% of target value
IOUT2 = 0mA; COUT2 = 10µF
0.579 0.6 0.621
V
1
500
nA
0.1
ms
High-Side On-Resistance
Low-Side On-Resistance
Leakage Current into SW2
Leakage Current out of SW2
Anti-Ringing Resistance
Buck Switching Frequency
Minimum Switching Frequency⁽⁸⁾
Maximum Duty Cycle
Buck Current Limit
ISW2 = 100mA; VOUT1 = 1.8V
ISW2 = -100mA; VOUT1 = 1.8V
VOUT1 = 3.3V, VSW2 = 3.3V, VEN = 0V,
VOUT2 = 3.3V
VOUT1 = 3.3V, VSW2 = 0V, VEN = 0V, VOUT2=0V
560
mΩ
380
mΩ
0.01
2
µA
0.01
0.5
µA
80
140
Ω
POUT2 = 8mW (PFM Mode)
VFB2 = 0.5V
80
kHz
100
%
Maximum Output Current
30
mA
Current-Limit Threshold (PMOS)
VFB2 = 0.5V
80
120
mA
Buck Power Supply Rejection
PSRR (ΔVOUT1/ΔVOUT2)
ΔVOUT1 = 200mVp-p, f = 217Hz, IOUT2 = 10mA
50
dB
PSRR (ΔVOUT1/ΔVOUT2)
ΔVOUT1 = 200mVp-p, f = 1.0kHz, IOUT2 = 10mA
50
dB
PSRR (ΔVOUT1/ΔVOUT2)
ΔVOUT1 = 200mVp-p, f = 20kHz, IOUT2 = 10mA
42
dB
May 27, 2014
7
Revision 1.2