MIC23099_14 Datasheet, PDF (6/26 Pages) Micrel Semiconductor – Single AA/AAA Cell Step-Up/Step-Down Regulators with Battery Monitoring

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
Boost
Boost Reference (FB1)
Feedback Regulation Voltage
VIN = 0.9V to 1.5V
PWM Mode
0.579 0.6 0.621
V
FB Bias Current
Soft-Start Time
Boost Internal MOSFETs
VFB1 = 0.6V
VOUT1: 10% to 90% of target value
RLOAD = 500Ω; COUT1 = 47µF
1
500
nA
5
ms
High-Side On-Resistance
Low-Side On-Resistance
Leakage Current into SW1
Anti-Ringing Resistance
ISW1 = 100mA; VIN = 1.25V
ISW1 = -100mA; VIN = 1.25V
VSW = 4.0V, VOUT1 = 0V, VEN = 0V, VIN = 4.0V
200
mΩ
140
mΩ
0.01
2
µA
80
140
Ω
Boost Switching Frequency
Switching Frequency
Minimum Switching Frequency⁽⁸⁾
Minimum Duty Cycle
Maximum Duty Cycle
Boost Current Limit
PWM Mode
POUT1 = 20mW (PFM Mode)
VFB1 = 0.7V
VFB1 = 0.5V
0.9
1.0
1.1
100
15
85
MHz
kHz
%
%
Maximum Output Power
Current-Limit Threshold (NMOS)
Current-Limit Threshold (PMOS)
Linear Mode Current Limit (PMOS)
Boost Power Supply Rejection
VOUT1>1.8V; IOUT2 = 0mA
VFB1 = 0.5V
VFB1 = 0.5V
VIN=1.25V, VOUT1 = 0V
450
mW
1.0
1.5
2.0
A
1.5
2.5
3.0
A
56
80
180
mA
PSRR (ΔVIN/ΔVOUT1)
PSRR (ΔVIN/ΔVOUT1)
PSRR (ΔVIN/ΔVOUT1)
ΔVIN = 200mVp-p, f = 217Hz, IOUT1 = PFM
50
dB
ΔVIN = 200mVp-p, f = 1.0kHz, IOUT1 = PFM
50
dB
ΔVIN = 200mVp-p, f = 20kHz, IOUT1 = PFM
42
dB
August 6, 2014
6
Revision 1.3